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| author | Amir Goldstein <amir73il@gmail.com> | 2019-05-05 12:15:49 +0300 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2019-05-09 13:44:00 +0300 |
| commit | 4d8e7055a4058ee191296699803c5090e14f0dff (patch) | |
| tree | a7e72b2ea6aea71fc5f82dbe6a52a224d4f23dc2 /include/linux/fsnotify_backend.h | |
| parent | 11a6f8e2db26519b6468686411deafab81c14741 (diff) | |
| download | linux-4d8e7055a4058ee191296699803c5090e14f0dff.tar.xz | |
fsnotify: fix unlink performance regression
__fsnotify_parent() has an optimization in place to avoid unneeded
take_dentry_name_snapshot(). When fsnotify_nameremove() was changed
not to call __fsnotify_parent(), we left out the optimization.
Kernel test robot reported a 5% performance regression in concurrent
unlink() workload.
Reported-by: kernel test robot <rong.a.chen@intel.com>
Link: https://lore.kernel.org/lkml/20190505062153.GG29809@shao2-debian/
Link: https://lore.kernel.org/linux-fsdevel/20190104090357.GD22409@quack2.suse.cz/
Fixes: 5f02a8776384 ("fsnotify: annotate directory entry modification events")
CC: stable@vger.kernel.org
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'include/linux/fsnotify_backend.h')
| -rw-r--r-- | include/linux/fsnotify_backend.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index dfc28fcb4de8..094b38f2d9a1 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -355,6 +355,7 @@ extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u extern void __fsnotify_inode_delete(struct inode *inode); extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt); extern void fsnotify_sb_delete(struct super_block *sb); +extern void fsnotify_nameremove(struct dentry *dentry, int isdir); extern u32 fsnotify_get_cookie(void); static inline int fsnotify_inode_watches_children(struct inode *inode) @@ -524,6 +525,9 @@ static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt) static inline void fsnotify_sb_delete(struct super_block *sb) {} +static inline void fsnotify_nameremove(struct dentry *dentry, int isdir) +{} + static inline void fsnotify_update_flags(struct dentry *dentry) {} |