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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/cifs/inode.c
parent2fd6b7f50797f2e993eea59e0a0b8c6399c811dc (diff)
downloadop-kernel-dev-b23fb0a60379a95e10c671f646b259ea2558421e.zip
op-kernel-dev-b23fb0a60379a95e10c671f646b259ea2558421e.tar.gz
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/cifs/inode.c')
-rw-r--r--fs/cifs/inode.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 589f3e3..0036983 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -810,12 +810,15 @@ inode_has_hashed_dentries(struct inode *inode)
struct dentry *dentry;
spin_lock(&dcache_lock);
+ spin_lock(&dcache_inode_lock);
list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
+ spin_unlock(&dcache_inode_lock);
spin_unlock(&dcache_lock);
return true;
}
}
+ spin_unlock(&dcache_inode_lock);
spin_unlock(&dcache_lock);
return false;
}
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