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        Wed, 14 Mar 2018 09:47:02 -0700 (PDT)
Subject: Re: SIGBUS failure for misc/tst-bz21269 on i386
To: libc-alpha@sourceware.org
References: <bd3a427a-9c46-bad1-2cb6-d31b228d2fbf@redhat.com>
 <CAMe9rOoaQOOtWh_VGUNBfjWoeERxAauWPg5WZ7FhW-FF086a8w@mail.gmail.com>
From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Message-ID: <b5b89870-618a-1118-1083-616bd57d2056@linaro.org>
Date: Wed, 14 Mar 2018 16:47:00 -0000
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On 14/03/2018 10:44, H.J. Lu wrote:
> On Wed, Mar 14, 2018 at 6:34 AM, Florian Weimer <fweimer@redhat.com> wrote:
>> Has anyone else seen this failure?
>>
>> I saw it with this kernel:
>>
>> Linux buildvm-09.phx2.fedoraproject.org 4.15.3-300.fc27.x86_64 #1 SMP Tue
>> Feb 13 17:02:01 UTC 2018 i686 i686 i386 GNU/Linux
>>
>> The CPU has AVX2, but not AVX-512.  I couldn't reproduce it on another AVX2
>> machine.  The failure happened in the Fedora build environment, so I don't
>> have a coredump.
>>
> 
> I didn't see it on AVX2 machines under 4.15.9-300.fc27.x86_64.
> 
> BTW, I always disable abrtd so that I can get a core dump.  I also have
> 
> [hjl@gnu-tools-1 etc]$ cat /etc/sysctl.d/coredump.conf
> kernel.core_pattern=core
> [hjl@gnu-tools-1 etc]$
> 

Also it should trigger a kernel regression since I used a kernel test
(tools/testing/selftests/x86/ldt_gdt.c) as base.