From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Jonathan Corbet <corbet-T1hC0tSOHrs@public.gmane.org>
Cc: Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andi Kleen <andi-Vw/NltI1exuRpAAqCnN02g@public.gmane.org>,
hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org
Subject: Re: [PATCH, RFC] Remove fasync() BKL usage, take 3325
Date: Wed, 28 Jan 2009 05:23:37 +0100 [thread overview]
Message-ID: <20090128042337.GA15060@redhat.com> (raw)
In-Reply-To: <20090127205739.1384343f-vw3g6Xz/EtPk1uMJSBkQmQ@public.gmane.org>
On 01/27, Jonathan Corbet wrote:
>
> On Wed, 28 Jan 2009 04:14:39 +0100
> Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>
> > I'll try to make the patch tomorrow, but the problem is that I am not
> > sure this is not too ugly.
>
> FWIW, I'm partway through a new attempt using bitops for f_flags, moving
> FASYNC flag handling into fasync_helper(), and doing away with
> additional locks altogether. I have to get past the publication
> deadline before I can finish it, though.
Great. I'd be happy to agree with another approach.
But please don't forget it is not strictly necessary f_op->fasync()
must use fasync_helper(). And we have users (pipe_rdwr_fasync) which
call fasync_helper() twice.
Oleg.
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WARNING: multiple messages have this Message-ID (diff)
From: Oleg Nesterov <oleg@redhat.com>
To: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <andi@firstfloor.org>,
hch@infradead.org, linux-kernel@vger.kernel.org,
viro@ZenIV.linux.org.uk, linux-api@vger.kernel.org,
alan@lxorguk.ukuu.org.uk
Subject: Re: [PATCH, RFC] Remove fasync() BKL usage, take 3325
Date: Wed, 28 Jan 2009 05:23:37 +0100 [thread overview]
Message-ID: <20090128042337.GA15060@redhat.com> (raw)
In-Reply-To: <20090127205739.1384343f@bike.lwn.net>
On 01/27, Jonathan Corbet wrote:
>
> On Wed, 28 Jan 2009 04:14:39 +0100
> Oleg Nesterov <oleg@redhat.com> wrote:
>
> > I'll try to make the patch tomorrow, but the problem is that I am not
> > sure this is not too ugly.
>
> FWIW, I'm partway through a new attempt using bitops for f_flags, moving
> FASYNC flag handling into fasync_helper(), and doing away with
> additional locks altogether. I have to get past the publication
> deadline before I can finish it, though.
Great. I'd be happy to agree with another approach.
But please don't forget it is not strictly necessary f_op->fasync()
must use fasync_helper(). And we have users (pipe_rdwr_fasync) which
call fasync_helper() twice.
Oleg.
next prev parent reply other threads:[~2009-01-28 4:23 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-15 22:32 [PATCH, RFC] Remove fasync() BKL usage, take 3325 Jonathan Corbet
2009-01-15 22:32 ` Jonathan Corbet
[not found] ` <20090115153211.663df310-vw3g6Xz/EtPk1uMJSBkQmQ@public.gmane.org>
2009-01-22 14:51 ` Andrew Morton
2009-01-22 14:51 ` Andrew Morton
[not found] ` <20090122065104.2787df2d.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-01-22 16:09 ` Andi Kleen
2009-01-22 16:09 ` Andi Kleen
[not found] ` <20090122160935.GI15750-qrUzlfsMFqo/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2009-01-23 5:21 ` Jonathan Corbet
2009-01-23 5:21 ` Jonathan Corbet
2009-01-22 20:32 ` Christoph Hellwig
2009-01-22 20:32 ` Christoph Hellwig
[not found] ` <20090122203248.GA20159-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2009-01-23 4:56 ` Andi Kleen
2009-01-23 4:56 ` Andi Kleen
[not found] ` <20090123045646.GK15750-qrUzlfsMFqo/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2009-01-28 0:53 ` Andrew Morton
2009-01-28 0:53 ` Andrew Morton
2009-01-28 0:55 ` Andrew Morton
2009-01-28 0:55 ` Andrew Morton
[not found] ` <20090127165504.53ed7a2d.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-01-28 3:14 ` Oleg Nesterov
2009-01-28 3:14 ` Oleg Nesterov
[not found] ` <20090128031439.GA11025-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-01-28 3:57 ` Jonathan Corbet
2009-01-28 3:57 ` Jonathan Corbet
[not found] ` <20090127205739.1384343f-vw3g6Xz/EtPk1uMJSBkQmQ@public.gmane.org>
2009-01-28 4:23 ` Oleg Nesterov [this message]
2009-01-28 4:23 ` Oleg Nesterov
[not found] ` <20090128042337.GA15060-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2009-01-28 14:13 ` Jonathan Corbet
2009-01-28 14:13 ` Jonathan Corbet
2009-01-28 17:36 ` Christoph Hellwig
2009-01-28 17:36 ` Christoph Hellwig
[not found] ` <20090128173618.GA3174-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2009-01-28 17:44 ` Jonathan Corbet
2009-01-28 17:44 ` Jonathan Corbet
[not found] ` <20090128104414.09aee3f9-vw3g6Xz/EtPk1uMJSBkQmQ@public.gmane.org>
2009-01-28 17:55 ` Christoph Hellwig
2009-01-28 17:55 ` Christoph Hellwig
[not found] ` <20090128175541.GA7074-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2009-01-28 18:13 ` Matt Mackall
2009-01-28 18:13 ` Matt Mackall
2009-01-28 21:05 ` Jonathan Corbet
2009-01-28 21:05 ` Jonathan Corbet
2009-01-28 18:14 ` David Daney
2009-01-28 18:14 ` David Daney
2009-01-29 14:37 ` Andi Kleen
2009-01-29 14:37 ` Andi Kleen
2009-01-23 5:15 ` Jonathan Corbet
2009-01-23 5:15 ` Jonathan Corbet
2009-01-23 5:31 ` Andrew Morton
2009-01-23 5:31 ` Andrew Morton
[not found] ` <20090122213105.74142908.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2009-01-23 5:45 ` Matt Mackall
2009-01-23 5:45 ` Matt Mackall
2009-01-23 6:15 ` Andi Kleen
2009-01-23 6:15 ` Andi Kleen
2009-01-23 10:45 ` Bernd Petrovitsch
2009-01-23 5:54 ` Andi Kleen
2009-01-23 5:54 ` Andi Kleen
[not found] ` <20090123055404.GL15750-qrUzlfsMFqo/4alezvVtWx2eb7JE58TQ@public.gmane.org>
2009-01-23 6:01 ` Jonathan Corbet
2009-01-23 6:01 ` Jonathan Corbet
2009-01-23 6:57 ` Andrew Morton
2009-01-23 6:57 ` Andrew Morton
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