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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:32 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:21 +1100 |
| commit | b7ab39f631f505edc2bbdb86620d5493f995c9da (patch) | |
| tree | 62be97ebc7fc69ceb601f23312d335ebb8038ee7 /fs/configfs | |
| parent | 2304450783dfde7b0b94ae234edd0dbffa865073 (diff) | |
| download | lwn-b7ab39f631f505edc2bbdb86620d5493f995c9da.tar.gz lwn-b7ab39f631f505edc2bbdb86620d5493f995c9da.zip | |
fs: dcache scale dentry refcount
Make d_count non-atomic and protect it with d_lock. This allows us to ensure a
0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when
we start protecting many other dentry members with d_lock.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/configfs')
| -rw-r--r-- | fs/configfs/dir.c | 3 | ||||
| -rw-r--r-- | fs/configfs/inode.c | 2 |
2 files changed, 2 insertions, 3 deletions
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c index 20024a9ef5a7..e9acea440ffc 100644 --- a/fs/configfs/dir.c +++ b/fs/configfs/dir.c @@ -394,8 +394,7 @@ static void remove_dir(struct dentry * d) if (d->d_inode) simple_rmdir(parent->d_inode,d); - pr_debug(" o %s removing done (%d)\n",d->d_name.name, - atomic_read(&d->d_count)); + pr_debug(" o %s removing done (%d)\n",d->d_name.name, d->d_count); dput(parent); } diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c index 253476d78ed8..79b37765d8ff 100644 --- a/fs/configfs/inode.c +++ b/fs/configfs/inode.c @@ -253,7 +253,7 @@ void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent) spin_lock(&dcache_lock); spin_lock(&dentry->d_lock); if (!(d_unhashed(dentry) && dentry->d_inode)) { - dget_locked(dentry); + dget_locked_dlock(dentry); __d_drop(dentry); spin_unlock(&dentry->d_lock); spin_unlock(&dcache_lock); |