linux-kernel - Re: KVM selftests are failing

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Date:   Thu, 15 Nov 2018 09:41:38 +0100
From:   Andrew Jones <drjones@...hat.com>
To:     Ahmed Soliman <ahmedsoliman@...a.vt.edu>
Cc:     Anders Roxell <anders.roxell@...aro.org>,
        Shuah Khan <shuah@...nel.org>, linux-kselftest@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: KVM selftests are failing

On Wed, Nov 14, 2018 at 09:23:41PM +0200, Ahmed Soliman wrote:
> Hello,
> 
> > > I couldn't reproduce this on a Westmere. Are you sure you're testing
> > > a clean compilation? Can you bisect the kernel?
> I don't do a make clean normally, but I will do it this time when
> bisecting,

Sorry, I meant a clean build of the kvm selftests, not the kernel. The
kvm selftests makefile is a bit lacking and I've noticed that tests can
assert in random places if they aren't built from scratch - ensuring all
changed dependencies also get recompiled. Fixing up the makefile is on
my todo, but it wasn't very high on it, since 'make clean && make' is
fast enough.

> also I only use shallow
>  clones so it will also take some time pulling. Also to note, The arch
> I am using is Haswell, I am not
> sure if that should make any difference though.

I'm not sure either, and unfortunately I don't have the same hardware
as you to try and reproduce.

> > What would be the difference in CONFIG_* fragments that you both have enabled?
> 
> Here is my config file:
> https://pastebin.com/fCNV2z8c

I checked the differences but nothing interesting stood out. I'm using a
defconfig config with a couple extra file system modules tacked on.

drew