Messages in this thread | | | Date | Sat, 9 Jun 2012 02:31:27 +0300 | From | "Kirill A. Shutemov" <> | Subject | 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@ZenIV.linux.org.uk> 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?
Multiple inode caches? No. Multiple caches with call_rcu() free? See btrfs or gfs2.
-- Kirill A. Shutemov [unhandled content-type:application/pgp-signature] | |