linux-kernel - Re: Kernel 4.17.4 lockup

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Date:   Wed, 11 Jul 2018 09:49:04 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     "H.J. Lu" <hjl.tools@...il.com>
Cc:     "H. Peter Anvin" <hpa@...or.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Mel Gorman <mgorman@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Rik van Riel <riel@...riel.com>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: Kernel 4.17.4 lockup

On 07/11/2018 09:29 AM, H.J. Lu wrote:
>>> # 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.

It would be much appreciated if you can get a console of some kind on
that system and try to get a full KASAN oops out of it.  Serial, usb
debug, or maybe netconsole would probably work.

I'll also try to get it running on a big system and see if it triggers
faster there.