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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:35 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:22 +1100 |
| commit | b23fb0a60379a95e10c671f646b259ea2558421e (patch) | |
| tree | 7c3644b91241d32fda502a7be0b78e4c225f8091 /fs/9p | |
| parent | 2fd6b7f50797f2e993eea59e0a0b8c6399c811dc (diff) | |
| download | lwn-b23fb0a60379a95e10c671f646b259ea2558421e.tar.gz lwn-b23fb0a60379a95e10c671f646b259ea2558421e.zip | |
fs: scale inode alias list
Add a new lock, dcache_inode_lock, to protect the inode's i_dentry list
from concurrent modification. d_alias is also protected by d_lock.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/9p')
| -rw-r--r-- | fs/9p/vfs_inode.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 34bf71b56542..47dfd5d29a6b 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -271,9 +271,11 @@ static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode) struct dentry *dentry; spin_lock(&dcache_lock); + spin_lock(&dcache_inode_lock); /* Directory should have only one entry. */ BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry)); dentry = list_entry(inode->i_dentry.next, struct dentry, d_alias); + spin_unlock(&dcache_inode_lock); spin_unlock(&dcache_lock); return dentry; } |