From: Al Viro <viro@ZenIV.linux.org.uk>
To: Christoph Hellwig <hch@infradead.org>
Cc: Alessio Igor Bogani <abogani@texware.it>,
Jonathan Corbet <corbet@lwn.net>,
Fr??d??ric Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
LKML <linux-kernel@vger.kernel.org>,
LFSDEV <linux-fsdevel@vger.kernel.org>,
Matthew Wilcox <matthew@wil.cx>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH vfs-2.6:for-next] vfs: remount_fs BKL pushdown
Date: Wed, 6 May 2009 04:51:38 +0100 [thread overview]
Message-ID: <20090506035138.GP8633@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20090505204352.GA23343@infradead.org>
On Tue, May 05, 2009 at 04:43:52PM -0400, Christoph Hellwig wrote:
> On Tue, May 05, 2009 at 09:39:38PM +0200, Alessio Igor Bogani wrote:
> > >> Please also push down lock_super, no need to have two locking changes in
> > >> this area just after another.
> > >
> > > Do you plan to do that respin? ?I will need the lock_super pushdown for
> > > some sync work. ?I can wait for you if you plan to submit it, otherwise
> > > I'll out it on my TODO list.
> >
> > Apologize I have completely missed your first replay.
> >
> > Let me two days for finish that task and for do build and boot tests.
>
> Great! Thanks a lot for the effort.
Actually, I'm not sure that you are right. Especially if we go for your
"always hold s_umount for sync_filesystem()"; in that case we are guaranteed
that we'll have an exclusion between ->write_super() and that sucker, so
there's no reason to push it down into filesystems that do not use lock_super()
at all. And that'd be most of them...
Note that I've taken all callers of remount under exclusive s_umount (see
#untested in the vfs tree).
next prev parent reply other threads:[~2009-05-06 3:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-25 8:09 [PATCH vfs-2.6:for-next] vfs: remount_fs BKL pushdown Alessio Igor Bogani
2009-04-25 8:23 ` Christoph Hellwig
2009-05-05 13:37 ` Christoph Hellwig
2009-05-05 19:39 ` Alessio Igor Bogani
2009-05-05 20:43 ` Christoph Hellwig
2009-05-06 3:51 ` Al Viro [this message]
2009-05-06 6:26 ` Christoph Hellwig
2009-05-06 6:48 ` Al Viro
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