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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:32 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:21 +1100
commitb7ab39f631f505edc2bbdb86620d5493f995c9da (patch)
tree62be97ebc7fc69ceb601f23312d335ebb8038ee7 /kernel
parent2304450783dfde7b0b94ae234edd0dbffa865073 (diff)
downloadop-kernel-dev-b7ab39f631f505edc2bbdb86620d5493f995c9da.zip
op-kernel-dev-b7ab39f631f505edc2bbdb86620d5493f995c9da.tar.gz
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 'kernel')
-rw-r--r--kernel/cgroup.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 746055b..eb7af39 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3655,9 +3655,7 @@ again:
list_del(&cgrp->sibling);
cgroup_unlock_hierarchy(cgrp->root);
- spin_lock(&cgrp->dentry->d_lock);
d = dget(cgrp->dentry);
- spin_unlock(&d->d_lock);
cgroup_d_remove_dir(d);
dput(d);
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