From: Al Viro <viro@ZenIV.linux.org.uk>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems
Date: Fri, 8 Jun 2012 23:36:24 +0100 [thread overview]
Message-ID: <20120608223624.GU30000@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20120608153120.b722d7c3.akpm@linux-foundation.org>
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?
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?
next prev parent reply other threads:[~2012-06-08 22:36 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-08 21:41 [RFC, PATCH, RESEND] fs: push rcu_barrier() from deactivate_locked_super() to filesystems Kirill A. Shutemov
2012-06-08 22:00 ` [RFC, PATCH] " Kirill A. Shutemov
2012-06-08 22:06 ` Linus Torvalds
2012-06-08 22:25 ` Al Viro
2012-06-08 22:02 ` [RFC, PATCH, RESEND] " Andrew Morton
2012-06-08 22:14 ` Kirill A. Shutemov
2012-06-08 22:23 ` Al Viro
2012-06-08 22:27 ` Linus Torvalds
2012-06-08 22:25 ` Andrew Morton
2012-06-08 22:27 ` Al Viro
2012-06-08 22:31 ` Andrew Morton
2012-06-08 22:36 ` Al Viro [this message]
2012-06-08 22:40 ` Andrew Morton
2012-06-08 23:32 ` Kirill A. Shutemov
2012-06-08 23:31 ` Kirill A. Shutemov
2012-06-08 23:37 ` Andrew Morton
2012-06-08 23:46 ` Linus Torvalds
2012-06-09 0:28 ` Andrew Morton
2012-06-09 7:06 ` Marco Stornelli
[not found] ` <4FD2F5F4.1000106-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2012-06-09 7:25 ` Andrew Morton
2012-06-11 9:16 ` Kirill A. Shutemov
2012-06-08 23:28 ` Kirill A. Shutemov
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