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Re: [Qemu-devel] "iothread: release iothread around aio_poll" causes ran
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] "iothread: release iothread around aio_poll" causes random hangs at startup |
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Date: |
Wed, 3 Jun 2015 10:17:54 +0100 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, Jun 02, 2015 at 04:51:46PM +0200, Paolo Bonzini wrote:
>
>
> On 02/06/2015 16:36, Christian Borntraeger wrote:
> > commit a0710f7995f914e3044e5899bd8ff6c43c62f916
> > Author: Paolo Bonzini <address@hidden>
> > AuthorDate: Fri Feb 20 17:26:52 2015 +0100
> > Commit: Kevin Wolf <address@hidden>
> > 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.
Ok
Stefan
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