{"id":64275,"date":"2026-01-23T07:04:33","date_gmt":"2026-01-22T23:04:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/64275.html"},"modified":"2026-01-23T07:04:33","modified_gmt":"2026-01-22T23:04:33","slug":"%e7%ac%ac12%e7%ab%a0-mmu-notifier%e5%86%85%e6%a0%b8%e6%bc%94%e8%bf%9b%e4%b8%8e%e6%9c%aa%e6%9d%a5%e6%96%b9%e5%90%91","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/64275.html","title":{"rendered":"\u7b2c12\u7ae0: MMU notifier\u5185\u6838\u6f14\u8fdb\u4e0e\u672a\u6765\u65b9\u5411"},"content":{"rendered":"<h3>12.1 \u5386\u53f2\u6f14\u8fdb<\/h3>\n<h4>12.1.1 mmu_notifier\u8bde\u751f&#xff08;2008\u5e74&#xff09;<\/h4>\n<p>\u539f\u59cbmmu_notifier\u8bbe\u8ba1&#xff08;2008\u5e74\u5f15\u5165&#xff09;&#xff1a;<\/p>\n<ul>\n<li>Copyright \u00a9 2008 Qumranet, Inc.<\/li>\n<li>Copyright \u00a9 2008 SGI<\/li>\n<li>Author: Christoph Lameter cl&#064;linux.com<\/li>\n<\/ul>\n<p>\u65e9\u671f\u8bbe\u8ba1\u76ee\u6807 &#xff1a;<\/p>\n<li>\u4e3aKVM\u865a\u62df\u5316\u63d0\u4f9bshadow page table\u540c\u6b65\u673a\u5236<\/li>\n<li>\u652f\u6301RDMA\u5185\u5b58\u6ce8\u518c\u5931\u6548\u901a\u77e5<\/li>\n<li>\u4e3a\u672a\u6765\u5f02\u6784\u5185\u5b58\u7ba1\u7406\u5960\u5b9a\u57fa\u7840<\/li>\n<p>\u521d\u59cb\u5b9e\u73b0\u7279\u70b9:<\/p>\n<ul>\n<li>\u5168\u5c40\u901a\u77e5\u6a21\u578b&#xff08;\u901a\u77e5\u6574\u4e2amm&#xff09;<\/li>\n<li>\u7b80\u5355\u7684\u94fe\u8868\u7ed3\u6784<\/li>\n<li>\u56de\u8c03\u9a71\u52a8\u7684\u4e8b\u4ef6\u6a21\u578b<\/li>\n<\/ul>\n<p><span class=\"token comment\">\/* \u65e9\u671fmmu_notifier_ops\u7ed3\u6784&#xff08;\u7b80\u5316\u7248&#xff09; *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_ops_v1<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/* \u9875\u8868\u6e05\u9664\u65f6\u901a\u77e5 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_page<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> address<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u8303\u56f4\u5931\u6548\u5f00\u59cb *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span><br \/>\n       <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n       <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">,<\/span><br \/>\n       <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u8303\u56f4\u5931\u6548\u7ed3\u675f *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span><br \/>\n     <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n     <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">,<\/span><br \/>\n     <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u8fdb\u7a0b\u9000\u51fa\u65f6\u901a\u77e5 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>release<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u65e9\u671f\u9650\u5236:<br \/>\n * &#8211; \u65e0\u6cd5\u7cbe\u786e\u8ddf\u8e2a\u7279\u5b9a\u5730\u5740\u8303\u56f4<br \/>\n * &#8211; \u56de\u8c03\u7c92\u5ea6\u7c97&#xff08;\u6574\u4e2amm\u7ea7\u522b&#xff09;<br \/>\n * &#8211; \u6027\u80fd\u5f00\u9500\u5927&#xff08;\u9700\u8981\u626b\u63cf\u5168\u90e8\u6620\u5c04&#xff09;<br \/>\n * &#8211; \u5e76\u53d1\u63a7\u5236\u7b80\u5355<br \/>\n *\/<\/span><\/p>\n<h4>12.1.2 \u6539\u8fdb\u9636\u6bb5&#xff08;2010-2018\u5e74&#xff09;<\/h4>\n<p>\u5173\u952e\u6539\u8fdb\u70b9: 2010\u5e74: \u5f15\u5165invalidate_range() &#8211; \u5728\u9875\u8868\u9501\u5916\u901a\u77e5 &#8211; \u63d0\u9ad8\u5e76\u53d1\u6027<\/p>\n<p>2012\u5e74: \u6539\u8fdb\u963b\u585e\u8bed\u4e49 &#8211; \u5f15\u5165non-blocking\u6807\u5fd7 &#8211; \u652f\u6301trylock\u6a21\u5f0f<\/p>\n<p>2014\u5e74: \u6dfb\u52a0clear_flush_young() &#8211; \u4f18\u5316\u9875\u9762\u8001\u5316 &#8211; \u51cf\u5c11TLB\u5237\u65b0\u5f00\u9500<\/p>\n<p>2015\u5e74: \u5f15\u5165mmu_notifier_range &#8211; \u7edf\u4e00\u4e8b\u4ef6\u63cf\u8ff0 &#8211; \u6dfb\u52a0\u4e8b\u4ef6\u7c7b\u578b\u6807\u5fd7<\/p>\n<p>2016\u5e74: \u4f18\u5316\u9501\u673a\u5236 &#8211; \u5f15\u5165SRCU (Sleepable RCU) &#8211; \u51cf\u5c11\u9501\u7ade\u4e89<\/p>\n<p><span class=\"token comment\">\/* \u6539\u8fdb\u540e\u7684mmu_notifier_range *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> flags<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">mmu_notifier_event<\/span> event<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u65b0\u589e\u4e8b\u4ef6\u7c7b\u578b<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span>owner<span class=\"token punctuation\">;<\/span>                     <span class=\"token comment\">\/\/ \u65b0\u589eowner\u5b57\u6bb5<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u4e8b\u4ef6\u7c7b\u578b\u679a\u4e3e *\/<\/span><br \/>\n<span class=\"token keyword\">enum<\/span> <span class=\"token class-name\">mmu_notifier_event<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nMMU_NOTIFY_UNMAP <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_CLEAR<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_PROTECTION_VMA<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_PROTECTION_PAGE<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_SOFT_DIRTY<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_RELEASE<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_MIGRATE<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_DEVICE_EXCLUSIVE<span class=\"token punctuation\">,<\/span><br \/>\nMMU_NOTIFY_EXCLUSIVE<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u6027\u80fd\u4f18\u5316:<br \/>\n * &#8211; \u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u56de\u8c03<br \/>\n * &#8211; \u66f4\u7ec6\u7c92\u5ea6\u7684\u4e8b\u4ef6\u5206\u7c7b<br \/>\n * &#8211; \u652f\u6301\u8bbe\u5907\u79c1\u6709\u9875<br \/>\n *\/<\/span><\/p>\n<h4>12.1.3 mmu_interval_notifier\u9769\u547d&#xff08;2019\u5e74&#xff09;<\/h4>\n<p>2019\u5e74\u91cd\u5927\u7a81\u7834: \u5f15\u5165mmu_interval_notifier \u52a8\u673a:<\/p>\n<li>GPU\u9a71\u52a8\u9700\u8981\u8ddf\u8e2a\u5927\u91cf\u5c0f\u533a\u95f4<\/li>\n<li>\u5168\u5c40\u626b\u63cf\u5f00\u9500\u592a\u5927<\/li>\n<li>\u9700\u8981\u66f4\u7cbe\u786e\u7684\u5931\u6548\u901a\u77e5<\/li>\n<li>HMM\u9700\u8981\u9ad8\u6548\u7684range\u8ddf\u8e2a<\/li>\n<p><span class=\"token comment\">\/* mmu_interval_notifier\u6838\u5fc3\u8bbe\u8ba1 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_interval_notifier<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">interval_tree_node<\/span> interval_tree<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ interval tree\u8282\u70b9<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_interval_notifier_ops<\/span> <span class=\"token operator\">*<\/span>ops<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">hlist_node<\/span> deferred_item<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> invalidate_seq<span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/\/ \u5e8f\u5217\u53f7\u540c\u6b65<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* interval tree\u4f18\u52bf *\/<\/span><br \/>\n<span class=\"token comment\">\/*<br \/>\n * \u6570\u636e\u7ed3\u6784: \u7ea2\u9ed1\u6811 &#043; \u533a\u95f4\u67e5\u8be2<br \/>\n * \u590d\u6742\u5ea6: O(log N &#043; K)<br \/>\n *   &#8211; N: \u603b\u533a\u95f4\u6570<br \/>\n *   &#8211; K: \u91cd\u53e0\u533a\u95f4\u6570<br \/>\n *<br \/>\n * \u5bf9\u6bd4\u4f20\u7edf\u65b9\u6848:<br \/>\n *   \u4f20\u7edf: O(N) &#8211; \u626b\u63cf\u6240\u6709notifier<br \/>\n *   \u65b0\u65b9\u6848: O(log N &#043; K) &#8211; \u53ea\u67e5\u8be2\u76f8\u5173\u533a\u95f4<br \/>\n *<br \/>\n * \u6027\u80fd\u63d0\u5347:<br \/>\n *   100\u4e2a\u533a\u95f4: 100x -&gt; 7x (14\u500d\u63d0\u5347)<br \/>\n *   1000\u4e2a\u533a\u95f4: 1000x -&gt; 10x (100\u500d\u63d0\u5347)<br \/>\n *   10000\u4e2a\u533a\u95f4: 10000x -&gt; 14x (700\u500d\u63d0\u5347)<br \/>\n *\/<\/span><\/p>\n<p><span class=\"token comment\">\/* \u5e8f\u5217\u53f7\u540c\u6b65\u673a\u5236 *\/<\/span><br \/>\n<span class=\"token comment\">\/*<br \/>\n * \u521b\u65b0\u70b9: \u65e0\u9501\u51b2\u7a81\u68c0\u6d4b<br \/>\n *<br \/>\n * \u5e8f\u5217\u53f7\u534f\u8bae:<br \/>\n *   \u5076\u6570 &#061; \u7a7a\u95f2\u72b6\u6001<br \/>\n *   \u5947\u6570 &#061; \u6b63\u5728\u8fdb\u884cinvalidate<br \/>\n *<br \/>\n * \u4f7f\u7528\u6a21\u5f0f:<br \/>\n *   seq &#061; read_begin()      \/\/ \u8bb0\u5f55\u8d77\u59cb\u5e8f\u5217\u53f7<br \/>\n *   &#8230; \u8bbf\u95ee\u9875\u8868 &#8230;<br \/>\n *   if (read_retry(seq))    \/\/ \u68c0\u6d4b\u51b2\u7a81<br \/>\n *       retry;              \/\/ \u91cd\u8bd5<br \/>\n *<br \/>\n * \u4f18\u52bf:<br \/>\n *   &#8211; \u65e0\u9700\u6301\u9501\u68c0\u67e5<br \/>\n *   &#8211; \u9ad8\u5e76\u53d1\u53cb\u597d<br \/>\n *   &#8211; \u9002\u5408\u957f\u65f6\u95f4\u64cd\u4f5c<br \/>\n *\/<\/span><\/p>\n<h4>12.1.4 \u53cc\u72b6\u6001\u4f18\u5316&#xff08;2020\u5e74&#xff09;<\/h4>\n<p>2020\u5e74\u4f18\u5316: \u53cc\u72b6\u6001invalidate\u673a\u5236 \u95ee\u9898: \u5373\u4f7f\u6ca1\u6709interval notifier&#xff0c;\u4e5f\u8981\u64cd\u4f5cinterval tree \u89e3\u51b3: \u533a\u5206\u4e24\u79cdinvalidate\u72b6\u6001<\/p>\n<p><span class=\"token comment\">\/\/ mm\/mmu_notifier.c<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_subscriptions<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">hlist_head<\/span> list<span class=\"token punctuation\">;<\/span><br \/>\nbool has_itree<span class=\"token punctuation\">;<\/span>                           <span class=\"token comment\">\/\/ \u662f\u5426\u6709interval notifier<\/span><br \/>\n<span class=\"token class-name\">spinlock_t<\/span> lock<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> invalidate_seq<span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/\/ \u5e8f\u5217\u53f7<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> active_invalidate_ranges<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u6d3b\u8dc3invalidate\u8ba1\u6570<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">rb_root_cached<\/span> itree<span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/\/ interval tree<\/span><br \/>\n<span class=\"token class-name\">wait_queue_head_t<\/span> wq<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">hlist_head<\/span> deferred_list<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u72b6\u6001\u673a\u8bbe\u8ba1:<br \/>\n *<br \/>\n * \u5b8c\u5168\u6392\u4ed6\u72b6\u6001 (Full Exclusion):<br \/>\n *   &#8211; invalidate_seq &amp; 1 &#061;&#061; 1 (\u5947\u6570)<br \/>\n *   &#8211; \u4e0d\u5141\u8bb8\u4fee\u6539interval tree<br \/>\n *   &#8211; \u7528\u4e8e\u904d\u5386\u56de\u8c03\u671f\u95f4<br \/>\n *<br \/>\n * \u90e8\u5206\u6392\u4ed6\u72b6\u6001 (Partial Exclusion):<br \/>\n *   &#8211; invalidate_seq &amp; 1 &#061;&#061; 0 (\u5076\u6570)<br \/>\n *   &#8211; \u5141\u8bb8\u4fee\u6539interval tree<br \/>\n *   &#8211; \u7528\u4e8e\u65e0interval notifier\u573a\u666f<br \/>\n *<br \/>\n * \u4f18\u5316\u6548\u679c:<br \/>\n *   \u65e0interval notifier\u65f6\u907f\u514d\u6602\u8d35\u7684tree\u52a0\u9501<br \/>\n *   \u51cf\u5c11invalidate_end\u5f00\u9500<br \/>\n *\/<\/span><\/p>\n<p><span class=\"token comment\">\/* \u72b6\u6001\u68c0\u67e5\u51fd\u6570 *\/<\/span><br \/>\n<span class=\"token keyword\">static<\/span> bool<br \/>\n<span class=\"token function\">mn_itree_is_invalidating<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_subscriptions<\/span> <span class=\"token operator\">*<\/span>subscriptions<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">lockdep_assert_held<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>subscriptions<span class=\"token operator\">-&gt;<\/span>lock<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> subscriptions<span class=\"token operator\">-&gt;<\/span>invalidate_seq <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5947\u6570&#061;\u6b63\u5728invalidate<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u6027\u80fd\u63d0\u5347:<br \/>\n * &#8211; KVM\u573a\u666f: 10-20% invalidate_end\u5f00\u9500\u964d\u4f4e<br \/>\n * &#8211; GPU\u573a\u666f: 15-30% \u6574\u4f53\u6027\u80fd\u63d0\u5347<br \/>\n *\/<\/span><\/p>\n<h3>12.2 \u5f53\u524d\u5185\u6838\u7248\u672c\u6539\u8fdb<\/h3>\n<h4>12.2.1 6.x\u5185\u6838\u7279\u6027<\/h4>\n<p>Linux 6.0&#043; \u4e3b\u8981\u6539\u8fdb:<\/p>\n<li>\n<p>\u7edf\u4e00\u7684mmu_notifier_range<\/p>\n<ul>\n<li>\u6240\u6709\u56de\u8c03\u4f7f\u7528\u76f8\u540c\u53c2\u6570<\/li>\n<li>\u7b80\u5316\u9a71\u52a8\u5b9e\u73b0<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6539\u8fdb\u7684\u6b7b\u9501\u68c0\u6d4b<\/p>\n<ul>\n<li>lockdep\u6ce8\u89e3\u589e\u5f3a<\/li>\n<li>\u8fd0\u884c\u65f6\u9a8c\u8bc1<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8bbe\u5907\u79c1\u6709\u9875\u652f\u6301<\/p>\n<ul>\n<li>DEVICE_PRIVATE\u9875\u7c7b\u578b<\/li>\n<li>\u8bbe\u5907\u72ec\u5360\u6a21\u5f0f<\/li>\n<\/ul>\n<\/li>\n<p><span class=\"token comment\">\/* \u5f53\u524dmmu_notifier_ops\u5b8c\u6574\u7248 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_ops<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/* \u91ca\u653e\u901a\u77e5 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>release<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u8303\u56f4\u5931\u6548 *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n      <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n     <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u9875\u9762\u8001\u5316 *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>clear_flush_young<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>clear_young<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>test_young<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> address<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u9875\u53d8\u810f\u901a\u77e5 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>change_pte<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> address<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token class-name\">pte_t<\/span> pte<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u8f85\u52a9TLB\u5931\u6548 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>arch_invalidate_secondary_tlbs<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* interval notifier\u5b8c\u6574\u7248 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_interval_notifier_ops<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">bool<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_interval_notifier<\/span> <span class=\"token operator\">*<\/span>interval_sub<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">,<\/span><br \/>\n   <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> cur_seq<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>12.2.2 SRCU\u4f18\u5316<\/h4>\n<p><span class=\"token comment\">\/\/ mm\/mmu_notifier.c<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * SRCU (Sleepable Read-Copy Update) \u4f7f\u7528<br \/>\n *<br \/>\n * \u4f18\u52bf:<br \/>\n * &#8211; \u5141\u8bb8\u56de\u8c03\u4e2d\u963b\u585e<br \/>\n * &#8211; \u66f4\u597d\u7684\u53ef\u6269\u5c55\u6027<br \/>\n * &#8211; \u51cf\u5c11\u9501\u4e89\u7528<br \/>\n *\/<\/span><\/p>\n<p><span class=\"token comment\">\/* \u5168\u5c40SRCU\u57df *\/<\/span><br \/>\n<span class=\"token function\">DEFINE_STATIC_SRCU<\/span><span class=\"token punctuation\">(<\/span>srcu<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* SRCU\u4fdd\u62a4\u7684\u904d\u5386 *\/<\/span><br \/>\n<span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">mn_hlist_invalidate_range_start<\/span><span class=\"token punctuation\">(<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_subscriptions<\/span> <span class=\"token operator\">*<\/span>subscriptions<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> id<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* SRCU\u8bfb\u4fa7\u4e34\u754c\u533a *\/<\/span><br \/>\nid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">srcu_read_lock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>srcu<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">hlist_for_each_entry_rcu<\/span><span class=\"token punctuation\">(<\/span>subscription<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>subscriptions<span class=\"token operator\">-&gt;<\/span>list<span class=\"token punctuation\">,<\/span><br \/>\n hlist<span class=\"token punctuation\">,<\/span> <span class=\"token function\">srcu_read_lock_held<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>srcu<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>subscription<span class=\"token operator\">-&gt;<\/span>ops<span class=\"token operator\">-&gt;<\/span>invalidate_range_start<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\nret <span class=\"token operator\">&#061;<\/span> subscription<span class=\"token operator\">-&gt;<\/span>ops<span class=\"token operator\">-&gt;<\/span><span class=\"token function\">invalidate_range_start<\/span><span class=\"token punctuation\">(<\/span><br \/>\nsubscription<span class=\"token punctuation\">,<\/span> range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>ret<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">srcu_read_unlock<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>srcu<span class=\"token punctuation\">,<\/span> id<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">return<\/span> ret<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * SRCU vs RCU\u5bf9\u6bd4:<br \/>\n *<br \/>\n * RCU:<br \/>\n *   &#8211; \u8bfb\u4fa7\u4e0d\u80fd\u963b\u585e<br \/>\n *   &#8211; \u66f4\u5feb\u7684\u8bfb\u6027\u80fd<br \/>\n *   &#8211; \u9002\u5408\u77ed\u4e34\u754c\u533a<br \/>\n *<br \/>\n * SRCU:<br \/>\n *   &#8211; \u8bfb\u4fa7\u53ef\u4ee5\u963b\u585e<br \/>\n *   &#8211; \u7a0d\u6162\u7684\u8bfb\u6027\u80fd<br \/>\n *   &#8211; \u9002\u5408\u957f\u4e34\u754c\u533a<br \/>\n *   &#8211; \u66f4\u597d\u7684CPU\u9694\u79bb<br \/>\n *<br \/>\n * MMU notifier\u9009\u62e9SRCU\u539f\u56e0:<br \/>\n *   &#8211; \u56de\u8c03\u53ef\u80fd\u9700\u8981\u7b49\u5f85\u786c\u4ef6<br \/>\n *   &#8211; \u53ef\u80fd\u9700\u8981\u83b7\u53d6\u9501<br \/>\n *   &#8211; \u64cd\u4f5c\u65f6\u95f4\u4e0d\u786e\u5b9a<br \/>\n *\/<\/span><\/p>\n<h4>12.2.3 Lockdep\u96c6\u6210<\/h4>\n<p><span class=\"token comment\">\/\/ mm\/mmu_notifier.c<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifdef<\/span> <span class=\"token expression\">CONFIG_LOCKDEP<\/span><\/span><br \/>\n<span class=\"token comment\">\/* lockdep\u6ce8\u89e3 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">lockdep_map<\/span> __mmu_notifier_invalidate_range_start_map <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token punctuation\">.<\/span>name <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;mmu_notifier_invalidate_range_start&#034;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * Lockdep\u68c0\u6d4b\u573a\u666f:<br \/>\n *<br \/>\n * 1. \u9501\u987a\u5e8f\u8fdd\u53cd<br \/>\n *    invalidate\u56de\u8c03\u4e2d\u4e0d\u5f53\u7684\u9501\u64cd\u4f5c<br \/>\n *<br \/>\n * 2. \u9012\u5f52invalidate<br \/>\n *    \u56de\u8c03\u4e2d\u89e6\u53d1\u65b0\u7684page fault<br \/>\n *<br \/>\n * 3. \u6b7b\u9501\u8def\u5f84<br \/>\n *    \u4e0eGUP\u6216\u5176\u4ed6mm\u9501\u7684\u51b2\u7a81<br \/>\n *\/<\/span><\/p>\n<p><span class=\"token comment\">\/* \u4f7f\u7528\u793a\u4f8b *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">__mmu_notifier_invalidate_range_start<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mm_struct<\/span> <span class=\"token operator\">*<\/span>mm <span class=\"token operator\">&#061;<\/span> range<span class=\"token operator\">-&gt;<\/span>mm<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> ret<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* Lockdep\u68c0\u67e5\u70b9 *\/<\/span><br \/>\n<span class=\"token function\">lock_map_acquire<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>__mmu_notifier_invalidate_range_start_map<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u6267\u884cinvalidate *\/<\/span><br \/>\nret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">mn_itree_invalidate<\/span><span class=\"token punctuation\">(<\/span>mm<span class=\"token operator\">-&gt;<\/span>notifier_subscriptions<span class=\"token punctuation\">,<\/span> range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">mn_hlist_invalidate_range_start<\/span><span class=\"token punctuation\">(<\/span>mm<span class=\"token operator\">-&gt;<\/span>notifier_subscriptions<span class=\"token punctuation\">,<\/span> range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token function\">lock_map_release<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>__mmu_notifier_invalidate_range_start_map<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">return<\/span> ret<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u8c03\u8bd5\u6280\u5de7:<br \/>\n *<br \/>\n * \u542f\u7528lockdep:<br \/>\n *   CONFIG_LOCKDEP&#061;y<br \/>\n *   CONFIG_PROVE_LOCKING&#061;y<br \/>\n *   CONFIG_LOCK_STAT&#061;y<br \/>\n *<br \/>\n * \u67e5\u770b\u9501\u7edf\u8ba1:<br \/>\n *   cat \/proc\/lock_stat<br \/>\n *<br \/>\n * \u8ffd\u8e2a\u9501\u4f9d\u8d56:<br \/>\n *   echo 1 &gt; \/proc\/sys\/kernel\/lock_stat<br \/>\n *\/<\/span><\/p>\n<h3>12.3 \u672a\u6765\u53d1\u5c55\u65b9\u5411<\/h3>\n<h4>12.3.1 \u786c\u4ef6\u52a0\u901f\u8d8b\u52bf<\/h4>\n<p>\u65b0\u786c\u4ef6\u7279\u6027:<\/p>\n<li>\n<p>ATS (Address Translation Services)<\/p>\n<ul>\n<li>PCIe\u8bbe\u5907\u76f4\u63a5\u67e5\u8be2CPU\u9875\u8868<\/li>\n<li>\u51cf\u5c11\u8f6f\u4ef6\u540c\u6b65\u5f00\u9500<\/li>\n<li>\u786c\u4ef6\u81ea\u52a8\u5931\u6548<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>PASID (Process Address Space ID)<\/p>\n<ul>\n<li>\u591a\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u9694\u79bb<\/li>\n<li>IOMMU\u539f\u751f\u652f\u6301<\/li>\n<li>\u66f4\u7cbe\u786e\u7684TLB\u7ba1\u7406<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>CCIX\/CXL (Cache Coherent Interconnect)<\/p>\n<ul>\n<li>\u786c\u4ef6\u7f13\u5b58\u4e00\u81f4\u6027<\/li>\n<li>\u51cf\u5c11\u8f6f\u4ef6\u901a\u77e5\u9700\u6c42<\/li>\n<li>\u66f4\u4f4e\u5ef6\u8fdf<\/li>\n<\/ul>\n<\/li>\n<p><span class=\"token comment\">\/* \u672a\u6765API\u8bbe\u8ba1\u8003\u8651 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_ops_future<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/* \u652f\u6301\u786c\u4ef6\u52a0\u901f\u8def\u5f84 *\/<\/span><br \/>\n<span class=\"token function\">bool<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>supports_hardware_invalidate<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* PASID\u652f\u6301 *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>bind_pasid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span> u32 pasid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>unbind_pasid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span> u32 pasid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u6279\u91cf\u64cd\u4f5c *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_ranges<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>mn<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>ranges<span class=\"token punctuation\">,<\/span><br \/>\n <span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> count<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u4f18\u5316\u65b9\u5411:<br \/>\n * &#8211; \u786c\u4ef6\u611f\u77e5\u7684\u901a\u77e5\u8def\u5f84<br \/>\n * &#8211; \u81ea\u9002\u5e94\u6279\u91cf\u5904\u7406<br \/>\n * &#8211; \u96f6\u62f7\u8d1d\u6570\u636e\u4f20\u8f93<br \/>\n *\/<\/span><\/p>\n<h4>12.3.2 \u5f02\u6784\u5185\u5b58\u7ba1\u7406\u589e\u5f3a<\/h4>\n<p>HMM\u672a\u6765\u6f14\u8fdb:<\/p>\n<li>\n<p>\u7edf\u4e00\u5185\u5b58\u67b6\u6784<\/p>\n<ul>\n<li>CPU\/GPU\/\u52a0\u901f\u5668\u5171\u4eab\u5730\u5740\u7a7a\u95f4<\/li>\n<li>\u900f\u660e\u9875\u9762\u8fc1\u79fb<\/li>\n<li>\u81ea\u52a8\u8d1f\u8f7d\u5e73\u8861<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u591a\u5c42\u5185\u5b58\u652f\u6301<\/p>\n<ul>\n<li>DRAM &#043; NVM &#043; Device Memory<\/li>\n<li>\u81ea\u52a8\u5206\u5c42\u7b56\u7565<\/li>\n<li>\u6027\u80fd\u4f18\u5148\u653e\u7f6e<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7ec6\u7c92\u5ea6\u4fdd\u62a4<\/p>\n<ul>\n<li>\u5b50\u9875\u7c92\u5ea6\u4fdd\u62a4<\/li>\n<li>\u7075\u6d3b\u7684\u8bbf\u95ee\u6743\u9650<\/li>\n<li>\u786c\u4ef6\u52a0\u901f\u68c0\u67e5<\/li>\n<\/ul>\n<\/li>\n<p><span class=\"token comment\">\/* \u6982\u5ff5\u6027\u672a\u6765\u63a5\u53e3 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">hmm_range_v2<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_interval_notifier<\/span> <span class=\"token operator\">*<\/span>notifier<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> notifier_seq<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u591a\u6bb5\u652f\u6301 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> start<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> end<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> <span class=\"token operator\">*<\/span>hmm_pfns<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> segments<span class=\"token punctuation\">[<\/span>HMM_MAX_SEGMENTS<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> nr_segments<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u6269\u5c55\u6807\u5fd7 *\/<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> flags<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">HMM_RANGE_MULTI_DEVICE<\/span>  <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>  <\/span><span class=\"token comment\">\/\/ \u591a\u8bbe\u5907\u534f\u540c<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">HMM_RANGE_PREFAULT<\/span>      <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>  <\/span><span class=\"token comment\">\/\/ \u9884\u5148fault<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">HMM_RANGE_ASYNC<\/span>         <span class=\"token expression\"><span class=\"token function\">BIT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span>  <\/span><span class=\"token comment\">\/\/ \u5f02\u6b65\u5904\u7406<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/* \u8bbe\u5907\u5217\u8868 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token operator\">*<\/span><span class=\"token operator\">*<\/span>devices<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">int<\/span> nr_devices<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u7814\u7a76\u65b9\u5411:<br \/>\n * &#8211; \u673a\u5668\u5b66\u4e60\u9a71\u52a8\u7684\u9875\u9762\u653e\u7f6e<br \/>\n * &#8211; \u9884\u6d4b\u6027\u9884\u53d6<br \/>\n * &#8211; \u81ea\u9002\u5e94\u8fc1\u79fb\u7b56\u7565<br \/>\n *\/<\/span><\/p>\n<h4>12.3.3 \u6027\u80fd\u4f18\u5316\u65b9\u5411<\/h4>\n<p>\u6301\u7eed\u4f18\u5316\u76ee\u6807:<\/p>\n<li>\n<p>\u51cf\u5c11\u5ef6\u8fdf<\/p>\n<ul>\n<li>\u66f4\u5feb\u7684interval tree\u67e5\u8be2<\/li>\n<li>\u65e0\u9501\u5feb\u901f\u8def\u5f84<\/li>\n<li>\u6279\u91cf\u5904\u7406\u4f18\u5316<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u63d0\u9ad8\u5e76\u53d1<\/p>\n<ul>\n<li>Per-CPU\u6570\u636e\u7ed3\u6784<\/li>\n<li>\u7ec6\u7c92\u5ea6\u9501<\/li>\n<li>Lock-free\u7b97\u6cd5<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u964d\u4f4e\u5185\u5b58\u5f00\u9500<\/p>\n<ul>\n<li>\u538b\u7f29interval tree<\/li>\n<li>\u5171\u4eab\u516c\u5171\u6570\u636e<\/li>\n<li>\u6309\u9700\u5206\u914d<\/li>\n<\/ul>\n<\/li>\n<p><span class=\"token comment\">\/* \u53ef\u80fd\u7684\u4f18\u5316\u5b9e\u73b0 *\/<\/span><\/p>\n<p><span class=\"token comment\">\/* Per-CPU interval tree *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">per_cpu_itree<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">rb_root_cached<\/span> tree<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">spinlock_t<\/span> lock<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span> ____cacheline_aligned<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u5206\u533a\u8bbe\u8ba1 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">partitioned_notifier_subscriptions<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/* \u5168\u5c40notifier&#xff08;\u4fdd\u6301\u5411\u540e\u517c\u5bb9&#xff09; *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">hlist_head<\/span> global_list<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* Per-CPU interval tree *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">per_cpu_itree<\/span> __percpu <span class=\"token operator\">*<\/span>per_cpu_trees<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u7edf\u8ba1\u4fe1\u606f *\/<\/span><br \/>\n<span class=\"token class-name\">atomic64_t<\/span> total_intervals<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">atomic64_t<\/span> invalidate_count<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u9884\u671f\u6548\u679c:<br \/>\n * &#8211; 50%&#043; \u5e76\u53d1\u6027\u80fd\u63d0\u5347<br \/>\n * &#8211; 30%&#043; \u5ef6\u8fdf\u964d\u4f4e<br \/>\n * &#8211; 20%&#043; \u5185\u5b58\u8282\u7701<br \/>\n *\/<\/span><\/p>\n<h4>12.3.4 \u6807\u51c6\u5316\u548c\u534f\u540c<\/h4>\n<p>\u8de8\u5b50\u7cfb\u7edf\u534f\u4f5c:<\/p>\n<li>\n<p>\u4e0eio_uring\u96c6\u6210<\/p>\n<ul>\n<li>\u5f02\u6b65invalidate\u901a\u77e5<\/li>\n<li>\u6279\u91cfI\/O\u4f18\u5316<\/li>\n<li>\u96f6\u62f7\u8d1d\u8def\u5f84<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e0eeBPF\u96c6\u6210<\/p>\n<ul>\n<li>\u53ef\u7f16\u7a0b\u7b56\u7565<\/li>\n<li>\u8fd0\u884c\u65f6\u8c03\u4f18<\/li>\n<li>\u76d1\u63a7\u548c\u8ffd\u8e2a<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e0ecgroup\u96c6\u6210<\/p>\n<ul>\n<li>\u8d44\u6e90\u9650\u5236<\/li>\n<li>QoS\u4fdd\u8bc1<\/li>\n<li>\u9694\u79bb\u6027\u589e\u5f3a<\/li>\n<\/ul>\n<\/li>\n<p><span class=\"token comment\">\/* \u6982\u5ff5\u6027eBPF\u7a0b\u5e8f *\/<\/span><br \/>\n<span class=\"token comment\">\/*<br \/>\nSEC(&#034;mmu_notifier\/invalidate&#034;)<br \/>\nint mmu_notifier_invalidate_prog(struct mmu_notifier_range *range)<br \/>\n{<br \/>\n\/\/ \u7528\u6237\u5b9a\u4e49\u7684\u7b56\u7565<br \/>\nif (should_skip_invalidate(range))<br \/>\nreturn 0;<\/p>\n<p>\/\/ \u81ea\u5b9a\u4e49\u9884\u5904\u7406<br \/>\npreprocess_range(range);<\/p>\n<p>\/\/ \u7ee7\u7eed\u6807\u51c6\u5904\u7406<br \/>\nreturn 1;<br \/>\n}<br \/>\n*\/<\/span><\/p>\n<p><span class=\"token comment\">\/*<br \/>\n * \u6807\u51c6\u5316\u5de5\u4f5c:<br \/>\n * &#8211; \u8de8\u67b6\u6784API\u7edf\u4e00<br \/>\n * &#8211; \u8bbe\u5907\u9a71\u52a8\u6700\u4f73\u5b9e\u8df5<br \/>\n * &#8211; \u6027\u80fd\u57fa\u51c6\u6d4b\u8bd5<br \/>\n * &#8211; \u4e92\u64cd\u4f5c\u6027\u6307\u5357<br \/>\n *\/<\/span><\/p>\n<h3>12.4 \u793e\u533a\u8ba8\u8bba\u70ed\u70b9<\/h3>\n<p>\u6d3b\u8dc3\u63d0\u6848:<\/p>\n<li>\n<p>\u5f02\u6b65invalidate\u901a\u77e5<\/p>\n<ul>\n<li>\u5141\u8bb8\u5ef6\u8fdf\u5904\u7406<\/li>\n<li>\u51cf\u5c11\u963b\u585e\u65f6\u95f4<\/li>\n<li>\u63d0\u9ad8\u54cd\u5e94\u6027<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7ec6\u7c92\u5ea6\u4e8b\u4ef6\u8fc7\u6ee4<\/p>\n<ul>\n<li>\u53ea\u63a5\u6536\u76f8\u5173\u4e8b\u4ef6<\/li>\n<li>\u51cf\u5c11\u566a\u97f3\u901a\u77e5<\/li>\n<li>\u4f18\u5316\u6027\u80fd<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7edf\u8ba1\u548c\u76d1\u63a7API<\/p>\n<ul>\n<li>\u6807\u51c6\u5316\u6027\u80fd\u8ba1\u6570\u5668<\/li>\n<li>\u8fd0\u884c\u65f6\u8bca\u65ad\u63a5\u53e3<\/li>\n<li>\u95ee\u9898\u5b9a\u4f4d\u5de5\u5177<\/li>\n<\/ul>\n<\/li>\n<h4>12.4.1 \u5f53\u524d\u63d0\u6848<\/h4>\n<p><span class=\"token comment\">\/* \u63d0\u6848: \u5f02\u6b65invalidate *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_ops_async<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token comment\">\/* \u540c\u6b65\u8def\u5f84&#xff08;\u5feb\u901f&#xff09; *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_start_fast<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u5f02\u6b65\u8def\u5f84&#xff08;\u6162\u901f&#xff09; *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>invalidate_range_start_async<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier<\/span> <span class=\"token operator\">*<\/span>subscription<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">work_struct<\/span> <span class=\"token operator\">*<\/span>work<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* \u63d0\u6848: \u4e8b\u4ef6\u8fc7\u6ee4 *\/<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_filter<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> event_mask<span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u611f\u5174\u8da3\u7684\u4e8b\u4ef6<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> addr_min<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5730\u5740\u8303\u56f4\u6700\u5c0f\u503c<\/span><br \/>\n<span class=\"token keyword\">unsigned<\/span> <span class=\"token keyword\">long<\/span> addr_max<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/\/ \u5730\u5740\u8303\u56f4\u6700\u5927\u503c<\/span><br \/>\n<span class=\"token function\">bool<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>should_notify<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">mmu_notifier_range<\/span> <span class=\"token operator\">*<\/span>range<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>12.4.2 \u4e89\u8bae\u70b9<\/h4>\n<p>\u793e\u533a\u4e89\u8bae:<\/p>\n<li>\n<p>\u6027\u80fd vs \u6b63\u786e\u6027<\/p>\n<ul>\n<li>\u5ef6\u8fdf\u901a\u77e5\u7684\u5b89\u5168\u6027<\/li>\n<li>\u5f31\u5e8f\u5185\u5b58\u6a21\u578b\u5f71\u54cd<\/li>\n<li>Race condition\u98ce\u9669<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u590d\u6742\u5ea6 vs \u7075\u6d3b\u6027<\/p>\n<ul>\n<li>API\u7b80\u5355\u6027<\/li>\n<li>\u9a71\u52a8\u5b9e\u73b0\u96be\u5ea6<\/li>\n<li>\u7ef4\u62a4\u6210\u672c<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u901a\u7528\u6027 vs \u7279\u5316<\/p>\n<ul>\n<li>\u4e3a\u7279\u5b9a\u786c\u4ef6\u4f18\u5316<\/li>\n<li>\u4fdd\u6301\u67b6\u6784\u4e2d\u7acb<\/li>\n<li>\u5e73\u8861\u53d6\u820d<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h3>12.5 \u5c0f\u7ed3<\/h3>\n<p>MMU notifier\u6f14\u8fdb\u8f68\u8ff9:<\/p>\n<li>2008\u5e74: \u57fa\u7840\u6846\u67b6&#xff0c;\u5168\u5c40\u901a\u77e5<\/li>\n<li>2010-2018\u5e74: \u6e10\u8fdb\u6539\u8fdb&#xff0c;\u4f18\u5316\u6027\u80fd<\/li>\n<li>2019\u5e74: interval notifier\u9769\u547d\u6027\u7a81\u7834<\/li>\n<li>2020\u5e74&#043;: \u53cc\u72b6\u6001\u4f18\u5316&#xff0c;\u6301\u7eed\u6f14\u8fdb<\/li>\n<p>\u672a\u6765\u65b9\u5411:<\/p>\n<ul>\n<li>\u786c\u4ef6\u52a0\u901f\u96c6\u6210<\/li>\n<li>\u5f02\u6784\u5185\u5b58\u7edf\u4e00\u7ba1\u7406<\/li>\n<li>\u6027\u80fd\u6301\u7eed\u4f18\u5316<\/li>\n<li>\u8de8\u5b50\u7cfb\u7edf\u534f\u4f5c<\/li>\n<\/ul>\n<p>\u5173\u952e\u8d8b\u52bf:<\/p>\n<ul>\n<li>\u4ece\u5168\u5c40\u5230\u5c40\u90e8&#xff08;interval tree&#xff09;<\/li>\n<li>\u4ece\u540c\u6b65\u5230\u5f02\u6b65&#xff08;\u53ef\u80fd\u7684\u65b9\u5411&#xff09;<\/li>\n<li>\u4ece\u8f6f\u4ef6\u5230\u786c\u4ef6&#xff08;ATS\/PASID&#xff09;<\/li>\n<li>\u4ece\u5355\u4e00\u5230\u534f\u540c&#xff08;HMM\/CXL&#xff09;<\/li>\n<\/ul>\n<p>\u672c\u4e13\u680f\u5230\u6b64\u5df2\u5b8c\u7ed3\u3002\u5982\u679c\u5185\u6838\u6709upstream&#xff0c;\u4f1a\u53ca\u65f6\u66f4\u65b0&#xff0c;\u8bf7\u6301\u7eed\u5173\u6ce8\u3002<\/p>\n<hr \/>\n<p>&#x1f517; \u5bfc\u822a<\/p>\n<ul>\n<li>\u4e0a\u4e00\u7ae0: \u7b2c11\u7ae0: \u6027\u80fd\u5206\u6790\u4e0e\u8c03\u4f18<\/li>\n<li>\u9644\u5f55A&#xff1a;API\u5feb\u901f\u53c2\u8003<\/li>\n<li>\u8fd4\u56de\u76ee\u5f55: Linux MMU Notifier \u673a\u5236\u4e0e\u5e94\u7528\u7cfb\u5217\u76ee\u5f55<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>12.1 \u5386\u53f2\u6f14\u8fdb<br \/>\n12.1.1 mmu_notifier\u8bde\u751f&#xff08;2008\u5e74&#xff09;<br \/>\n\u539f\u59cbmmu_notifier\u8bbe\u8ba1&#xff08;2008\u5e74\u5f15\u5165&#xff09;&#xff1a;<br \/>\nCopyright \u00a9 2008 Qumranet, Inc.Copyright \u00a9 2008 SGIAuthor: Christoph Lameter cllinux.com<br \/>\n\u65e9\u671f\u8bbe\u8ba1\u76ee\u6807 &#xff1a;<br \/>\n\u4e3aKVM\u865a\u62df\u5316\u63d0\u4f9bshadow page table\u540c\u6b65\u673a<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[6779,6780],"topic":[],"class_list":["post-64275","post","type-post","status-publish","format-standard","hentry","category-server","tag-mmu","tag-mmu-notifier"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u7b2c12\u7ae0: MMU notifier\u5185\u6838\u6f14\u8fdb\u4e0e\u672a\u6765\u65b9\u5411 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/64275.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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