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Re: [Qemu-devel] "iothread: release iothread around aio_poll" causes ran
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] "iothread: release iothread around aio_poll" causes random hangs at startup |
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Date: |
Thu, 16 Jul 2015 13:20:42 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
On 16/07/2015 13:03, Christian Borntraeger wrote:
> For what its worth, I can no longer reproduce the issue on
> current master + cherry-pick of a0710f7995f (iothread: release iothread
> around aio_poll)
>
> bisect tells me that
>
> commit 53ec73e264f481b79b52efcadc9ceb8f8996975c
> Author: Fam Zheng <address@hidden>
> AuthorDate: Fri May 29 18:53:14 2015 +0800
> Commit: Stefan Hajnoczi <address@hidden>
> CommitDate: Tue Jul 7 14:27:14 2015 +0100
>
> block: Use bdrv_drain to replace uncessary bdrv_drain_all
>
> made the problem will blk-null go away. I still dont understand why.
It could be related to the AioContext problem that I'm fixing these
days, too. Good news, we'll requeue the patch for 2.5.
Paolo