[RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
akpm at linux-foundation.org
Fri Jun 8 18:28:42 MDT 2012
On Fri, 8 Jun 2012 16:46:47 -0700 Linus Torvalds <torvalds at linux-foundation.org> wrote:
> Of course, if you just mean having a VFS wrapper that does
> static void vfs_inode_kmem_cache_destroy(struct kmem_cache *cachep)
> then we could do that. Not much better than what Kirill's patch did,
> but at least we could have that comment in just one single place.
That's conceptually what I meant. But it has the problem that new and
out-of-tree filesystems might forget to do it. Which is why I suggest
adding a kmem_cache* argument to unregister_filesystem() for this.
It's a bit awkward, and the fs can pass in NULL if it knows what it's
doing. But it's reliable.
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