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| author | Jan Kara <jack@suse.cz> | 2009-09-22 02:01:40 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 16:17:30 +0200 |
| commit | 55c37a840d9ec0ebed5c944355156d490b1ad5d1 (patch) | |
| tree | 5544b93b41133b85f7f825e61fe3583fb39ff211 /Documentation | |
| parent | mm: remove __{add,sub}_zone_page_state() (diff) | |
| download | linux-55c37a840d9ec0ebed5c944355156d490b1ad5d1.tar.xz linux-55c37a840d9ec0ebed5c944355156d490b1ad5d1.zip | |
vm: document that setting vfs_cache_pressure to 0 isn't a good idea
Reported-by: Christian Thaeter <ct@pipapo.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/sysctl/vm.txt | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt index c4de6359d440..e6fb1ec2744b 100644 --- a/Documentation/sysctl/vm.txt +++ b/Documentation/sysctl/vm.txt @@ -585,7 +585,9 @@ caching of directory and inode objects. At the default value of vfs_cache_pressure=100 the kernel will attempt to reclaim dentries and inodes at a "fair" rate with respect to pagecache and swapcache reclaim. Decreasing vfs_cache_pressure causes the kernel to prefer -to retain dentry and inode caches. Increasing vfs_cache_pressure beyond 100 +to retain dentry and inode caches. When vfs_cache_pressure=0, the kernel will +never reclaim dentries and inodes due to memory pressure and this can easily +lead to out-of-memory conditions. Increasing vfs_cache_pressure beyond 100 causes the kernel to prefer to reclaim dentries and inodes. ============================================================== |