From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Cc: xen-devel@lists.xensource.com,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: [Xen-devel] Re: [Qemu-devel] [PATCH 01/13] Handle terminating signals.
Date: Tue, 26 Aug 2008 13:50:39 -0500 [thread overview]
Message-ID: <48B4507F.9040609@codemonkey.ws> (raw)
In-Reply-To: <20080826174729.GB25893@shareable.org>
Jamie Lokier wrote:
> Leading to: why would (real) signals being used to collect AIO events
> anyway, if you don't have signalfd()? If you've got a helper thread,
> just call aio_suspend() in the helper thread.
There is no helper thread when signalfd() is available. The helper
thread thing is only for backwards compatibility or for unices that
don't support signalfd. Plus, there are a lot of places that we use
signals currently.
> Then you can just
> deliver the AIO completion result to the relevant data structure or
> even move it off the waiting queue (pthread_mutex_lock is your
> friend), then wake the main waiting thread with byte written to its
> pipe.
>
It's the queuing with threads where things start getting complicated and
error prone.
Regards,
Anthony Liguori
> -- Jamie
>
>
>
next prev parent reply other threads:[~2008-08-26 18:51 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-21 16:27 [Qemu-devel] [PATCH 00/13] merge some xen bits into qemu Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 01/13] Handle terminating signals Gerd Hoffmann
2008-08-21 20:11 ` Anthony Liguori
[not found] ` <m2n.s.1KWGbo-001Nr9@chiark.greenend.org.uk>
2008-08-26 10:44 ` Ian Jackson
2008-08-26 12:16 ` Gerd Hoffmann
2008-08-26 12:36 ` Ian Jackson
2008-08-26 12:58 ` Gerd Hoffmann
2008-08-26 17:55 ` Jamie Lokier
2008-08-26 13:17 ` Anthony Liguori
2008-08-26 13:38 ` [Xen-devel] " Ian Jackson
2008-08-26 14:52 ` Avi Kivity
2008-08-26 17:49 ` Jamie Lokier
2008-08-26 15:04 ` Anthony Liguori
2008-08-26 15:08 ` Ian Jackson
2008-08-26 15:20 ` Anthony Liguori
2008-08-26 15:28 ` Ian Jackson
2008-08-26 15:36 ` Anthony Liguori
2008-08-26 17:47 ` Jamie Lokier
2008-08-26 18:03 ` Jamie Lokier
2008-08-26 18:50 ` Anthony Liguori [this message]
2008-08-27 9:46 ` Ian Jackson
2008-08-27 16:27 ` Jamie Lokier
2008-08-27 16:35 ` Ian Jackson
2008-08-27 17:55 ` Anthony Liguori
2008-08-27 18:41 ` Jamie Lokier
2008-08-28 9:34 ` Ian Jackson
2008-09-07 2:41 ` Anthony Liguori
2008-08-26 15:36 ` Samuel Thibault
2008-08-26 15:21 ` Anthony Liguori
[not found] ` <m2n.s.1KXzwZ-002RA9@chiark.greenend.org.uk>
2008-08-26 15:23 ` Ian Jackson
2008-08-26 15:29 ` Avi Kivity
[not found] ` <m2n.s.1KY0XT-002RJM@chiark.greenend.org.uk>
2008-08-26 15:38 ` Ian Jackson
2008-08-26 16:12 ` Avi Kivity
2008-08-26 16:14 ` Julian Seward
2008-08-26 16:39 ` Anthony Liguori
2008-08-27 8:05 ` Avi Kivity
2008-08-27 8:49 ` Alan Cox
2008-08-27 9:10 ` Avi Kivity
2008-08-27 9:16 ` Keir Fraser
2008-08-27 9:12 ` Gleb Natapov
[not found] ` <m2n.s.1KXz4u-002Qvq@chiark.greenend.org.uk>
2008-08-26 14:55 ` Ian Jackson
2008-08-21 16:27 ` [Qemu-devel] [PATCH 02/13] add DisplayState->idle Gerd Hoffmann
2008-08-21 16:33 ` [Qemu-devel] " Samuel Thibault
2008-08-21 20:12 ` [Qemu-devel] " Anthony Liguori
2008-08-21 16:27 ` [Qemu-devel] [PATCH 03/13] add container_of() macro to osdep.h Gerd Hoffmann
2008-08-21 20:12 ` Anthony Liguori
2008-08-21 16:27 ` [Qemu-devel] [PATCH 04/13] move GUI_REFRESH_INTERVAL define from vl.c to console.h Gerd Hoffmann
2008-08-21 20:12 ` Anthony Liguori
2008-08-21 16:27 ` [Qemu-devel] [PATCH 05/13] xen: groundwork for xen support Gerd Hoffmann
2008-08-21 20:18 ` Anthony Liguori
2008-08-21 16:27 ` [Qemu-devel] [PATCH 06/13] xen: backend driver core Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 07/13] xen: add console backend driver Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 08/13] xen: add framebuffer " Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 09/13] xen: add block device " Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 10/13] xen: add net " Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 11/13] xen: blk & nic configuration via cmd line Gerd Hoffmann
2008-08-21 16:27 ` [Qemu-devel] [PATCH 12/13] set vnc password from xenstore Gerd Hoffmann
2008-08-21 20:14 ` Anthony Liguori
2008-08-21 20:19 ` [Xen-devel] " Daniel P. Berrange
2008-08-21 20:22 ` Anthony Liguori
2008-08-21 20:26 ` Daniel P. Berrange
2008-08-21 21:34 ` Gerd Hoffmann
2008-08-21 21:48 ` Daniel P. Berrange
2008-08-21 22:36 ` Anthony Liguori
2008-08-24 9:03 ` Avi Kivity
2008-08-22 7:04 ` Gerd Hoffmann
2008-08-22 19:11 ` Jamie Lokier
2008-08-22 19:01 ` Jamie Lokier
2008-08-21 22:34 ` Anthony Liguori
2008-08-22 8:27 ` Gerd Hoffmann
2008-08-24 8:57 ` Avi Kivity
2008-08-24 9:59 ` Jamie Lokier
2008-08-24 10:07 ` Avi Kivity
2008-08-24 12:48 ` Jamie Lokier
2008-08-21 20:59 ` Jamie Lokier
2008-08-21 21:29 ` Gerd Hoffmann
2008-08-26 10:13 ` Ian Jackson
2008-08-21 20:17 ` [Qemu-devel] Re: [Xen-devel] " Daniel P. Berrange
2008-08-21 21:25 ` Gerd Hoffmann
[not found] ` <m2n.s.1KWHfl-001Ntw@chiark.greenend.org.uk>
2008-08-26 10:47 ` Ian Jackson
2008-08-21 16:27 ` [Qemu-devel] [PATCH 13/13] xen: pv domain builder Gerd Hoffmann
[not found] ` <m2n.s.1KWDD7-002TB9@chiark.greenend.org.uk>
2008-08-26 10:31 ` [Qemu-devel] [PATCH 05/13] xen: groundwork for xen support Ian Jackson
2008-08-26 12:34 ` Gerd Hoffmann
2008-08-26 12:57 ` [Xen-devel] " Daniel P. Berrange
2008-08-26 13:20 ` Gerd Hoffmann
2008-08-26 13:23 ` Daniel P. Berrange
2008-08-26 13:33 ` Ian Jackson
2008-08-26 14:14 ` Daniel P. Berrange
2008-08-26 14:31 ` Gerd Hoffmann
2008-08-26 14:40 ` Daniel P. Berrange
2008-08-26 14:49 ` Gerd Hoffmann
2008-08-26 14:53 ` Daniel P. Berrange
2008-08-26 19:24 ` Gerd Hoffmann
2008-08-26 14:53 ` Ian Jackson
2008-08-27 8:51 ` Gerd Hoffmann
2008-08-27 9:53 ` Ian Jackson
2008-08-27 9:56 ` Daniel P. Berrange
2008-08-27 10:00 ` Ian Jackson
2008-08-27 10:23 ` Daniel P. Berrange
2008-08-27 10:37 ` Gerd Hoffmann
2008-08-27 10:44 ` Daniel P. Berrange
2008-08-27 11:01 ` Gerd Hoffmann
[not found] ` <m2n.s.1KXzR5-002R2A@chiark.greenend.org.uk>
2008-08-26 15:05 ` Ian Jackson
2008-08-26 15:09 ` Daniel P. Berrange
2008-08-26 13:24 ` Ian Jackson
2008-08-26 13:50 ` Daniel P. Berrange
[not found] ` <m2n.s.1KWDfC-002TCd@chiark.greenend.org.uk>
[not found] ` <m2n.s.1KWDGv-002TBJ@chiark.greenend.org.uk>
[not found] ` <m2n.s.1KWDEt-002TBA@chiark.greenend.org.uk>
2008-08-26 10:42 ` [Qemu-devel] [PATCH 13/13] xen: pv domain builder Ian Jackson
2008-08-26 10:50 ` [Xen-devel] " Samuel Thibault
2008-08-26 13:43 ` Ian Jackson
2008-08-26 21:00 ` Markus Armbruster
2008-08-26 12:55 ` Gerd Hoffmann
2008-08-26 13:14 ` Ian Jackson
2008-08-26 13:53 ` Gerd Hoffmann
2008-08-26 14:19 ` Ian Jackson
2008-08-26 20:00 ` [Xen-devel] " Gerd Hoffmann
2008-08-27 9:48 ` Ian Jackson
2008-08-26 13:56 ` Gerd Hoffmann
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