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fs: scale inode alias list

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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>
This commit is contained in:
Nick Piggin 2011-01-07 17:49:35 +11:00
parent 2fd6b7f507
commit b23fb0a603
9 changed files with 78 additions and 9 deletions
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4
fs/nfs/getroot.c
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@ -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;