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authorAndrew Morton <akpm@linux-foundation.org>2007-05-08 00:23:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:14:58 -0700
commit24c32d733dd44dbc5b9dcd0b8de58e16fdbeac76 (patch)
treeecec100dc2c779d09669d08681339ded6bf5409a
parentd52b908646b88cb1952ab8c9b2d4423908a23f11 (diff)
downloadop-kernel-dev-24c32d733dd44dbc5b9dcd0b8de58e16fdbeac76.zip
op-kernel-dev-24c32d733dd44dbc5b9dcd0b8de58e16fdbeac76.tar.gz
mm: shrink parent dentries when shrinking slab
Teach the dentry slab shrinker to aggressively shrink parent dentries when shrinking the dentry cache. This is done to attempt to improve the situation where the dentry slab cache gets a lot of internal fragmentation due to pages containing directory dentries. It is expected that this change will cause some of those dentries to be reaped earlier, and with less scanning. Needs careful testing. Cc: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/dcache.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 681cab8..268da2e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -879,7 +879,7 @@ static int shrink_dcache_memory(int nr, gfp_t gfp_mask)
if (nr) {
if (!(gfp_mask & __GFP_FS))
return -1;
- prune_dcache(nr, NULL, 0);
+ prune_dcache(nr, NULL, 1);
}
return (dentry_stat.nr_unused / 100) * sysctl_vfs_cache_pressure;
}
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