From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH V3] libxl: Increase device model startup
 timeout to 1min.
Date: Tue, 14 Jul 2015 08:55:20 +0100
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To: Jan Beulich <JBeulich@suse.com>
Cc: Anthony PERARD <anthony.perard@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, xen-devel@lists.xen.org, Wei Liu <wei.liu2@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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On Tue, 2015-07-14 at 07:17 +0100, Jan Beulich wrote:
> >>> On 07.07.15 at 17:41, <ian.campbell@citrix.com> wrote:
> > On Tue, 2015-07-07 at 16:14 +0100, Ian Jackson wrote:
> >> Anthony PERARD writes ("[PATCH V3] libxl: Increase device model startup 
> > timeout to 1min."):
> >> > On a busy host, QEMU may take more than 10s to load and start.
> >> > 
> >> > This is likely due to a bug in Linux where the I/O subsystem sometime
> >> > produce high latency under load and result in QEMU taking a long time to
> >> > load every single dynamic libraries.
> >> 
> >> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
> > 
> > Applied.
> 
> So is this the "answer" to "Problems with merlot* AMD Opteron 6376
> systems"?

It'll be hard to say until this change gets through the Xen push gate
and that version gets used for other branches (linux testing, libvirt,
ovmf, osstest's own gate etc).

At the moment it looks like it has helped with some but not all of the
issues.

These:

http://logs.test-lab.xenproject.org/osstest/results/host/merlot0.html
http://logs.test-lab.xenproject.org/osstest/results/host/merlot1.html

still don't look brilliant, even if you only pay attention to the
xen-unstable lines.

Ian.