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


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