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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:35 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:22 +1100
commitb23fb0a60379a95e10c671f646b259ea2558421e (patch)
tree7c3644b91241d32fda502a7be0b78e4c225f8091 /fs/nfs
parent2fd6b7f50797f2e993eea59e0a0b8c6399c811dc (diff)
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/nfs')
-rw-r--r--fs/nfs/getroot.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index ac7b814ce16..850f67d5f0a 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -64,7 +64,11 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
* Oops, since the test for IS_ROOT() will fail.
*/
spin_lock(&dcache_lock);
+ spin_lock(&dcache_inode_lock);
+ spin_lock(&sb->s_root->d_lock);
list_del_init(&sb->s_root->d_alias);
+ spin_unlock(&sb->s_root->d_lock);
+ spin_unlock(&dcache_inode_lock);
spin_unlock(&dcache_lock);
}
return 0;