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| author | Goldwyn Rodrigues <rgoldwyn@gmail.com> | 2010-06-28 10:04:32 -0500 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2010-09-10 09:18:15 -0700 |
| commit | 5e98d492406818e6a94c0ba54c61f59d40cefa4a (patch) | |
| tree | 9eec0813194dd2192f6ae05d2f344e7839d2ab44 /fs/ocfs2/dcache.h | |
| parent | b4d693fcc5fe99ed211addb5c6a0f8398f0b266e (diff) | |
| download | lwn-5e98d492406818e6a94c0ba54c61f59d40cefa4a.tar.gz lwn-5e98d492406818e6a94c0ba54c61f59d40cefa4a.zip | |
Track negative entries v3
Track negative dentries by recording the generation number of the parent
directory in d_fsdata. The generation number for the parent directory is
recorded in the inode_info, which increments every time the lock on the
directory is dropped.
If the generation number of the parent directory and the negative dentry
matches, there is no need to perform the revalidate, else a revalidate
is forced. This improves performance in situations where nodes look for
the same non-existent file multiple times.
Thanks Mark for explaining the DLM sequence.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/dcache.h')
| -rw-r--r-- | fs/ocfs2/dcache.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ocfs2/dcache.h b/fs/ocfs2/dcache.h index f5dd1789acf1..b79eff709958 100644 --- a/fs/ocfs2/dcache.h +++ b/fs/ocfs2/dcache.h @@ -64,5 +64,6 @@ void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target, struct inode *old_dir, struct inode *new_dir); extern spinlock_t dentry_attach_lock; +void ocfs2_dentry_attach_gen(struct dentry *dentry); #endif /* OCFS2_DCACHE_H */ |