From: Paolo Bonzini <pbonzini@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: [Qemu-devel] "iothread: release iothread around aio_poll" causes random hangs at startup
Date: Tue, 02 Jun 2015 16:51:46 +0200 [thread overview]
Message-ID: <556DC302.5090409@redhat.com> (raw)
In-Reply-To: <556DBF87.2020908@de.ibm.com>
On 02/06/2015 16:36, Christian Borntraeger wrote:
> commit a0710f7995f914e3044e5899bd8ff6c43c62f916
> Author: Paolo Bonzini <pbonzini@redhat.com>
> AuthorDate: Fri Feb 20 17:26:52 2015 +0100
> Commit: Kevin Wolf <kwolf@redhat.com>
> CommitDate: Tue Apr 28 15:36:08 2015 +0200
>
> iothread: release iothread around aio_poll
>
> to cause a problem with hanging guests.
>
> Having many guests all with a kernel/ramdisk (via -kernel) and
> several null block devices will result in hangs. All hanging
> guests are in partition detection code waiting for an I/O to return
> so very early maybe even the first I/O.
>
> Reverting that commit "fixes" the hangs.
> Any ideas?
Stefan, please revert it as I will not have time to look at it until
well into 2.4 soft freeze.
Paolo
next prev parent reply other threads:[~2015-06-02 14:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-02 14:36 [Qemu-devel] "iothread: release iothread around aio_poll" causes random hangs at startup Christian Borntraeger
2015-06-02 14:51 ` Paolo Bonzini [this message]
2015-06-03 9:17 ` Stefan Hajnoczi
2015-06-09 2:28 ` Fam Zheng
2015-06-09 9:01 ` Christian Borntraeger
2015-06-10 2:12 ` Fam Zheng
2015-06-10 9:18 ` Christian Borntraeger
2015-06-10 9:34 ` Fam Zheng
2015-06-10 10:31 ` Christian Borntraeger
2015-07-16 11:03 ` Christian Borntraeger
2015-07-16 11:20 ` Paolo Bonzini
2015-07-16 11:24 ` Christian Borntraeger
2015-07-16 11:37 ` Paolo Bonzini
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