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Re: [Qemu-ppc] [Qemu-devel] [PULL 0/6] ppc patch queue 2017-08-09

From: David Gibson
Subject: Re: [Qemu-ppc] [Qemu-devel] [PULL 0/6] ppc patch queue 2017-08-09
Date: Mon, 14 Aug 2017 20:13:23 +1000
User-agent: Mutt/1.8.3 (2017-05-23)

On Fri, Aug 11, 2017 at 09:59:00AM +0100, Peter Maydell wrote:
> On 11 August 2017 at 09:51, David Gibson <address@hidden> wrote:
> > On Thu, Aug 10, 2017 at 01:47:03PM +0100, Peter Maydell wrote:
> >> On 9 August 2017 at 08:03, David Gibson <address@hidden> wrote:
> >> > I haven't completed a Travis build for this, which is part of my usual
> >> > test regime, since the first dozen or so Travis builds are failing
> >> > more often than not on master as well.  I don't know why this is -
> >> > seems to be failing some of the x86 tests.
> >>
> >> Doesn't look much worse than usual to me -- of the last 24 travis
> >> builds for master 4 failed and 20 passed.
> >
> > Uh.. that's not been my experience.  I was a bit unclear in my
> > description, though.  Until maybe a week and a half ago I found the
> > Travis build was fairly reliable, though there were occasional
> > transien failures.  Now, essentially every Travis build is failing for
> > me.  Specifically most of the first dozen or so of the batch of build
> > configurations on Travis fail (that's "X" not "!").  These seem to be
> > transient failures in the sense that if I rebuild enough times they'll
> > eventually pass, but unlike earlier when the builds would suceed most
> > of the time, they now seem to succeed at best around 1/3 of the time
> > (that's ~1/3 of the time for each configuration sub-build, so with a
> > dozen or so apparently affected that means a complete passing build
> > essentially never).
> >
> > See for example https://travis-ci.org/dgibson/qemu/builds/263312174
> > where 5 subbuilds have failed (which is relatively few).  In each case
> > the failing error seems to be something like:
> >
> > ERROR:tests/vhost-user-test.c:807:test_connect_fail: child process 
> > (/i386/vhost-user/connect-fail/subprocess [55883]) failed unexpectedly
> >
> > Seems to be i386 in some cases and x86_64 in others.
> Weird. https://travis-ci.org/qemu/qemu/builds is the master
> build history and as you can see it's mostly greens.
> Not sure why your setup would be significantly worse:
> maybe one of the travis submaintainers has an idea.
> It could just be our vhost-user-test is flaky but I don't
> know why that should hit you much more than master...

So, Travis is telling me my builds are being done on a trusty
environment (even the sub-builds which don't specify a distro
explicitly).  That doesn't seem to be the case for the master tree
builds.  Then again, the sub-builds which do specifically ask for
trusty seem to be working, so I'm not sure why implicity choosing
trusty would break things.

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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