From: Al Viro <viro@ZenIV.linux.org.uk>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
LKML <linux-kernel@vger.kernel.org>,
Andi Kleen <andi@firstfloor.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
bfields@fieldses.org, xfs-masters@oss.sgi.com
Subject: Re: RFC: Fix f_flags races without the BKL
Date: Fri, 2 Jan 2009 19:54:46 +0000 [thread overview]
Message-ID: <20090102195446.GJ28946@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20090102190902.GA25969@redhat.com>
On Fri, Jan 02, 2009 at 08:09:03PM +0100, Oleg Nesterov wrote:
> On 01/02, Al Viro wrote:
> >
> > Bloating with mutex is over the top, indeed, but why can't we simply keep
> > a pointer to fasync_struct in there? Do we ever have a struct file with
> > several fasync_struct?
>
> pipe_rdwr_fasync() ?
Ho-hum... Right you are ;-/
FWIW, it's still bloody tempting to try. How about hlist from struct file
through fasync_struct? Possibly with reference from fasync_struct back
to the queue it's on, while we are at it - would make fasync_helper simpler...
next prev parent reply other threads:[~2009-01-02 19:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-29 11:13 RFC: Fix f_flags races without the BKL Jonathan Corbet
2008-12-29 11:57 ` Sam Ravnborg
2008-12-30 12:49 ` Jonathan Corbet
2008-12-29 12:41 ` Oleg Nesterov
2008-12-29 15:27 ` Andi Kleen
2008-12-30 12:59 ` Jonathan Corbet
2008-12-30 13:04 ` [xfs-masters] " Christoph Hellwig
2008-12-30 13:37 ` Andi Kleen
2008-12-30 14:48 ` Christoph Hellwig
2008-12-31 9:52 ` Jonathan Corbet
2008-12-30 14:55 ` Andi Kleen
2009-01-08 23:28 ` Jonathan Corbet
2009-01-09 10:08 ` Oleg Nesterov
2009-01-09 13:18 ` Jonathan Corbet
2009-01-09 14:03 ` Oleg Nesterov
2009-01-09 15:09 ` Andi Kleen
2008-12-29 12:50 ` [xfs-masters] " Christoph Hellwig
2008-12-29 15:15 ` Andi Kleen
2009-01-02 18:29 ` Al Viro
2009-01-02 18:27 ` Al Viro
2009-01-02 18:42 ` Al Viro
2009-01-02 19:09 ` Oleg Nesterov
2009-01-02 19:54 ` Al Viro [this message]
2009-01-03 16:45 ` Oleg Nesterov
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