From 8f4634997bd97810a85a70b71f000378d9db2e55 Mon Sep 17 00:00:00 2001 From: Jamie Liu Date: Thu, 14 Mar 2019 08:11:36 -0700 Subject: Decouple filemem from platform and move it to pgalloc.MemoryFile. This is in preparation for improved page cache reclaim, which requires greater integration between the page cache and page allocator. PiperOrigin-RevId: 238444706 Change-Id: Id24141b3678d96c7d7dc24baddd9be555bffafe4 --- pkg/sentry/fs/fsutil/README.md | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'pkg/sentry/fs/fsutil/README.md') diff --git a/pkg/sentry/fs/fsutil/README.md b/pkg/sentry/fs/fsutil/README.md index 6e677890c..8be367334 100644 --- a/pkg/sentry/fs/fsutil/README.md +++ b/pkg/sentry/fs/fsutil/README.md @@ -112,11 +112,12 @@ finds the file that was mapped and its `CachingInodeOperations`. It then calls It may choose to allocate more memory (i.e. do "readahead") to minimize subsequent faults. -Memory that is allocated comes from a host tmpfs file (see `filemem.FileMem`). -The host tmpfs file memory is brought up to date with the contents of the mapped -file on its filesystem. The region of the host tmpfs file that reflects the -mapped file is then mapped into the host address space of the application so -that subsequent memory accesses do not repeatedly generate a `SIGSEGV`. +Memory that is allocated comes from a host tmpfs file (see +`pgalloc.MemoryFile`). The host tmpfs file memory is brought up to date with the +contents of the mapped file on its filesystem. The region of the host tmpfs file +that reflects the mapped file is then mapped into the host address space of the +application so that subsequent memory accesses do not repeatedly generate a +`SIGSEGV`. The range that was allocated, including any extra memory allocation to minimize faults, is marked dirty due to the write fault. This overcounts dirty memory if -- cgit v1.2.3