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authorNick Piggin <npiggin@suse.de>2010-10-10 05:36:24 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2010-10-25 21:26:12 -0400
commit265ac90230257e9c035e4b0c63a0c11c5336e93c (patch)
tree7bb17007af9812137eb2060fd9ef979e049f7acd /fs
parent312d3ca856d369bb04d0443846b85b4cdde6fa8a (diff)
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fs: improve DCACHE_REFERENCED usage
dentry referenced bit is only set when installing the dentry back onto the LRU. However with lazy LRU, the dentry can already be on the LRU list at dput time, thus missing out on setting the referenced bit. Fix this. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/dcache.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index c37a656..1a976d4 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -246,13 +246,16 @@ repeat:
if (dentry->d_op->d_delete(dentry))
goto unhash_it;
}
+
/* Unreachable? Get rid of it */
if (d_unhashed(dentry))
goto kill_it;
- if (list_empty(&dentry->d_lru)) {
- dentry->d_flags |= DCACHE_REFERENCED;
+
+ /* Otherwise leave it cached and ensure it's on the LRU */
+ dentry->d_flags |= DCACHE_REFERENCED;
+ if (list_empty(&dentry->d_lru))
dentry_lru_add(dentry);
- }
+
spin_unlock(&dentry->d_lock);
spin_unlock(&dcache_lock);
return;