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| author | Nick Piggin <npiggin@suse.de> | 2010-01-29 15:38:22 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-04-27 17:32:33 +0200 |
| commit | b9ab2f38fdee96ff49b8a7bbb65cbfc60921e40c (patch) | |
| tree | e5e785ba4ae7ec89564914c50638a22d756b6d19 /include | |
| parent | d4fe09131b66c5a7176a5dbfc9bd1ef6939643e8 (diff) | |
| download | lwn-b9ab2f38fdee96ff49b8a7bbb65cbfc60921e40c.tar.gz lwn-b9ab2f38fdee96ff49b8a7bbb65cbfc60921e40c.zip | |
fs-dcache-scale-d_subdirs
Protect d_subdirs and d_child with d_lock, except in filesystems that aren't
using dcache_lock for these anyway (eg. using i_mutex).
XXX: probably don't need parent lock in inotify (because child lock
should stabilize parent). Also, possibly some filesystems don't need so
much locking (eg. of child dentry when modifying d_child, so long as
parent is locked)... but be on the safe side. Hmm, maybe we should just
say d_child list is protected by d_parent->d_lock. d_parent could remain
protected with d_lock.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dcache.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h index fbbaee8f7829..8a6bb7157ff5 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -340,6 +340,7 @@ static inline struct dentry *dget_dlock(struct dentry *dentry) } return dentry; } + static inline struct dentry *dget(struct dentry *dentry) { if (dentry) { |