Re: [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems

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On Fri, Jun 08, 2012 at 03:31:20PM -0700, Andrew Morton wrote:
> On Fri, 8 Jun 2012 23:27:34 +0100
> Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> > On Fri, Jun 08, 2012 at 03:25:50PM -0700, Andrew Morton wrote:
> > 
> > > A neater implementation might be to add a kmem_cache* argument to
> > > unregister_filesystem().  If that is non-NULL, unregister_filesystem()
> > > does the rcu_barrier() and destroys the cache.  That way we get to
> > > delete (rather than add) a bunch of code from all filesystems and new
> > > and out-of-tree filesystems cannot forget to perform the rcu_barrier().
> > 
> > There's often enough more than one cache, so that one is no-go.
> kmem_cache** ;)
> Which filesystems have multiple inode caches?

inodes are not the only things that get caches of their own...

BTW, Kirill, would you mind not cross-posting to that many lists ever again?
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