From: Keir Fraser <keir@xen.org>
To: Olaf Hering <olaf@aepfle.de>
Cc: xen-devel@lists.xensource.com
Subject: Re: Need help with fixing the Xen waitqueue feature
Date: Tue, 22 Nov 2011 15:54:44 +0000 [thread overview]
Message-ID: <CAF17644.34841%keir@xen.org> (raw)
In-Reply-To: <CAF172FF.34839%keir@xen.org>
On 22/11/2011 15:40, "Keir Fraser" <keir@xen.org> wrote:
> I have a new theory, which is that if we go round the for-loop in
> wait_event() more than once, the vcpu's pause counter gets messed up and
> goes negative, condemning it to sleep forever.
Further to this, can you please try moving the call to __prepare_to_wait()
from just after the spinlock region to just before (i.e., immediately after
the ASSERT), in prepare_to_wait(). That could well makes things work better.
On UP at least -- for SMP systems I will also need to fix the broken usage
of wqv->esp...
-- Keir
next prev parent reply other threads:[~2011-11-22 15:54 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20111122150755.GA18727@aepfle.de>
2011-11-22 15:40 ` Need help with fixing the Xen waitqueue feature Keir Fraser
2011-11-22 15:54 ` Keir Fraser [this message]
2011-11-22 17:36 ` Olaf Hering
2011-11-22 17:42 ` Keir Fraser
2011-11-22 18:04 ` Olaf Hering
2011-11-22 21:15 ` Olaf Hering
2011-11-22 21:53 ` Keir Fraser
2011-11-23 17:00 ` Olaf Hering
2011-11-23 17:16 ` Keir Fraser
2011-11-23 18:06 ` Olaf Hering
2011-11-23 18:23 ` Keir Fraser
2011-11-23 18:18 ` Keir Fraser
2011-11-23 18:31 ` Olaf Hering
2011-11-23 19:21 ` Keir Fraser
2011-11-23 21:03 ` Keir Fraser
2011-11-23 22:30 ` Olaf Hering
2011-11-23 23:12 ` Keir Fraser
2011-11-24 10:00 ` Olaf Hering
2011-11-25 12:56 ` Olaf Hering
2011-11-25 18:26 ` Olaf Hering
2011-11-25 19:35 ` Keir Fraser
2011-11-24 9:15 ` Jan Beulich
2011-11-24 9:51 ` Keir Fraser
2011-11-24 9:58 ` Keir Fraser
[not found] <20111108224414.83985CF73A@homiemail-mx7.g.dreamhost.com>
2011-11-09 3:52 ` Andres Lagar-Cavilla
2011-11-09 7:09 ` Olaf Hering
2011-11-09 21:21 ` Andres Lagar-Cavilla
2011-11-22 14:34 ` George Dunlap
2011-11-09 21:30 ` Andres Lagar-Cavilla
2011-11-09 22:11 ` Olaf Hering
2011-11-10 4:29 ` Andres Lagar-Cavilla
2011-11-10 9:20 ` Jan Beulich
2011-11-10 9:26 ` Keir Fraser
2011-11-10 10:18 ` Olaf Hering
2011-11-10 12:05 ` Olaf Hering
[not found] <20111108214540.EAEBB72C4A1@homiemail-mx8.g.dreamhost.com>
2011-11-09 3:37 ` Andres Lagar-Cavilla
2011-11-09 7:02 ` Olaf Hering
2011-11-08 21:20 Olaf Hering
2011-11-08 22:05 ` Keir Fraser
2011-11-08 22:20 ` Olaf Hering
2011-11-08 22:54 ` Keir Fraser
2011-11-11 22:56 ` Olaf Hering
2011-11-12 7:00 ` Keir Fraser
2011-11-22 11:40 ` Olaf Hering
2011-11-22 13:04 ` Keir Fraser
2011-11-22 13:54 ` Olaf Hering
2011-11-22 14:24 ` Keir Fraser
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