Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64

From	Yves-Alexis Perez <corsac@debian.org>
Newsgroups	linux.debian.bugs.rc
Subject	Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64
Date	2018-01-06 16:20 +0100
Message-ID	<v4Yql-2TV-3@gated-at.bofh.it> (permalink)
References	(1 earlier) <uMIWJ-1ZK-3@gated-at.bofh.it> <v4Xuh-2jA-1@gated-at.bofh.it> <v4YgG-2Qv-9@gated-at.bofh.it> <uHiJz-4qB-1@gated-at.bofh.it> <v4YgG-2Qv-9@gated-at.bofh.it>
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control: reassign -1 xen-hypervisor-4.8-amd64

On Sat, 2018-01-06 at 15:23 +0100, Valentin Vidic wrote:
> On Sat, Jan 06, 2018 at 03:08:26PM +0100, Yves-Alexis Perez wrote:
> > According to that link, the fix seems to be configuration rather than
> > code.
> > Does this mean this bug against the kernel should be closed?
> 
> Yes, the problem seems to be in the Xen hypervisor and not the Linux
> kernel itself.  The default value for the gnttab_max_frames parameter
> needs to be increased to avoid domU disk IO hangs, for example:
> 
>   GRUB_CMDLINE_XEN="dom0_mem=10240M gnttab_max_frames=256"
> 
> So either close the bug or reassign it to xen-hypervisor package so
> they can increase the default value for this parameter in the
> hypervisor code.
> 
Ok, I'll reassign and let the Xen maintainers handle that (maybe in a stable
update).

@Xen maintainers: see the complete bug log for more information, but basically
it seems that a domu freezes happens with the “new” multi-queue xen blk
driver, and the fix is to increase a configuration value. Valentin suggests
adding that to the default.

Regards,
-- 
Yves-Alexis

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Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Yves-Alexis Perez <corsac@debian.org> - 2018-01-06 16:20 +0100
  Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Christian Schwamborn <christian.schwamborn@nswit.de> - 2018-01-15 11:30 +0100
    Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2018-01-15 12:10 +0100
      Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Hans van Kranenburg <hans@knorrie.org> - 2018-02-26 19:40 +0100
        Bug#880554: [Pkg-xen-devel] Bug#880554: Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2018-02-27 20:30 +0100
          Bug#880554: [Pkg-xen-devel] Bug#880554: Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64 Valentin Vidic <Valentin.Vidic@CARNet.hr> - 2018-02-28 09:00 +0100

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