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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:41 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:24 +1100 |
| commit | 89ad485f01fd83c47f17a128db3bd7b89c0f244f (patch) | |
| tree | 1f9772e3f0dc8ac9392341e677217caf2d9ba36c /fs | |
| parent | 61f3dee4af09528997a970280da240577bf60721 (diff) | |
| download | linux-89ad485f01fd83c47f17a128db3bd7b89c0f244f.tar.gz linux-89ad485f01fd83c47f17a128db3bd7b89c0f244f.tar.bz2 linux-89ad485f01fd83c47f17a128db3bd7b89c0f244f.zip | |
fs: dcache reduce locking in d_alloc
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/dcache.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 98a05696593e..ccdc5c2512df 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1253,11 +1253,13 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) if (parent) { spin_lock(&parent->d_lock); - spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED); + /* + * don't need child lock because it is not subject + * to concurrency here + */ dentry->d_parent = dget_dlock(parent); dentry->d_sb = parent->d_sb; list_add(&dentry->d_u.d_child, &parent->d_subdirs); - spin_unlock(&dentry->d_lock); spin_unlock(&parent->d_lock); } |