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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:07 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:32 +1100 |
| commit | 4b936885ab04dc6e0bb0ef35e0e23c1a7364d9e5 (patch) | |
| tree | a0173d27c1ce39f173be404d269c2f15144072ab /fs/dcache.c | |
| parent | 873feea09ebc980cbd3631b767356ce1eee65ec1 (diff) | |
| download | linux-4b936885ab04dc6e0bb0ef35e0e23c1a7364d9e5.tar.gz linux-4b936885ab04dc6e0bb0ef35e0e23c1a7364d9e5.tar.bz2 linux-4b936885ab04dc6e0bb0ef35e0e23c1a7364d9e5.zip | |
fs: improve scalability of pseudo filesystems
Regardless of how much we possibly try to scale dcache, there is likely
always going to be some fundamental contention when adding or removing children
under the same parent. Pseudo filesystems do not seem need to have connected
dentries because by definition they are disconnected.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 09ec945f3c98..9e6e6db76869 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1330,6 +1330,18 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) } EXPORT_SYMBOL(d_alloc); +struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name) +{ + struct dentry *dentry = d_alloc(NULL, name); + if (dentry) { + dentry->d_sb = sb; + dentry->d_parent = dentry; + dentry->d_flags |= DCACHE_DISCONNECTED; + } + return dentry; +} +EXPORT_SYMBOL(d_alloc_pseudo); + struct dentry *d_alloc_name(struct dentry *parent, const char *name) { struct qstr q; |