tree b74d2ecd1ac2a571d289e5525a0dc067ec1f35eb
parent a734eb458ab2bd11479a27dd54f48e1b26a55845
author Nick Piggin <npiggin@kernel.dk> 1294382985 +1100
committer Nick Piggin <npiggin@kernel.dk> 1294383025 +1100

fs: dcache reduce prune_one_dentry locking

prune_one_dentry can avoid quite a bit of locking in the common case where
ancestors have an elevated refcount. Alternatively, we could have gone the
other way and made fewer trylocks in the case where d_count goes to zero, but
is probably less common.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>