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From:   "H.J. Lu" <hjl.tools@gmail.com>
Date:   Wed, 11 Jul 2018 09:29:33 -0700
Message-ID: <CAMe9rOqc0oVw+ZLXCM-nrtPb1OiPFBeHt+Lsx+6K6y=t3HSVhA@mail.gmail.com>
Subject: Re: Kernel 4.17.4 lockup
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     "H. Peter Anvin" <hpa@zytor.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Mel Gorman <mgorman@suse.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@surriel.com>,
        Minchan Kim <minchan@kernel.org>
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On Wed, Jul 11, 2018 at 9:24 AM, Dave Hansen <dave.hansen@intel.com> wrote:
> On 07/11/2018 08:40 AM, H.J. Lu wrote:
>> This is a quad-core machine with HT and 6 GB RAM.  The workload is
>> x32 GCC build and test with "make -j8".  The bug is triggered during GCC
>> test after a couple hours.  I have a script to set up my workload:
>>
>> https://github.com/hjl-tools/gcc-regression
>>
>> with a cron job
>>
>> # It takes about 3 hour to bootstrap x86-64 GCC and 3 hour to run tests,
>> TIMEOUT=480
>> # Run it every hour,
>> 30 * * * * /export/gnu/import/git/gcc-test-x32/gcc-build -mx32
>> --with-pic > /dev/null 2>&1
>
> Oh, fun, one of those.
>
> How long does it take to reproduce?

About 5 hours.

-- 
H.J.