From: Anthony Liguori <anthony@codemonkey.ws>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [patch] Fix block I/O hang.
Date: Tue, 11 Nov 2008 15:07:00 -0600 [thread overview]
Message-ID: <4919F3F4.3010407@codemonkey.ws> (raw)
In-Reply-To: <4919F062.2070504@redhat.com>
Gerd Hoffmann wrote:
>
>> However,
>>
>>
>>> Third, when called from a select callback it shouldn't block indeed. It
>>> does though for me now and then when booting xen guests (with a big
>>> stack of xenner patches). Doesn't reproduce reliable though. Sprinkled
>>> in a printk (with rfd being non-blocking) and got a EAGAIN once, so it
>>> got called with rfd not having data.
>>>
>> I think it would be good to root cause this. AFAICT, it shouldn't block.
>>
>
> Yes, something is fishy here. Will try to pin it.
> Ideas where to look are welcome in case you have any ;)
>
Are you doing something funky with threads in xenner?
Regards,
Anthony Liguori
> cheers,
> Gerd
>
>
>
>
next prev parent reply other threads:[~2008-11-11 21:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-11 16:35 [Qemu-devel] [patch] Fix block I/O hang Gerd Hoffmann
2008-11-11 16:49 ` Anthony Liguori
2008-11-11 17:48 ` Gerd Hoffmann
2008-11-11 17:55 ` Anthony Liguori
2008-11-11 20:51 ` Gerd Hoffmann
2008-11-11 21:07 ` Anthony Liguori [this message]
2008-11-11 21:34 ` Gerd Hoffmann
2008-11-12 13:49 ` Johannes Stezenbach
2008-11-12 14:58 ` Anthony Liguori
2008-11-12 15:01 ` Gerd Hoffmann
2008-11-12 13:03 ` Gerd Hoffmann
2008-11-12 14:57 ` Anthony Liguori
2008-11-13 9:14 ` Gerd Hoffmann
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