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fs: avoid inode RCU freeing for pseudo fs

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Pseudo filesystems that don't put inode on RCU list or reachable by
rcu-walk dentries do not need to RCU free their inodes.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin
2011-01-07 17:49:50 +11:00
parent fa0d7e3de6
commit ff0c7d15f9
5 changed files with 23 additions and 10 deletions
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19
net/socket.c
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@@ -262,20 +262,21 @@ static struct inode *sock_alloc_inode(struct super_block *sb)
}
static void sock_free_rcu(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
struct socket_alloc *ei = container_of(inode, struct socket_alloc,
vfs_inode);
kfree(ei->socket.wq);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(sock_inode_cachep, ei);
static void wq_free_rcu(struct rcu_head *head)
{
struct socket_wq *wq = container_of(head, struct socket_wq, rcu);
kfree(wq);
}
static void sock_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, sock_free_rcu);
struct socket_alloc *ei;
ei = container_of(inode, struct socket_alloc, vfs_inode);
call_rcu(&ei->socket.wq->rcu, wq_free_rcu);
kmem_cache_free(sock_inode_cachep, ei);
}
static void init_once(void *foo)