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Subject: Re: Kernel 4.17.4 lockup
From:   Andy Lutomirski <luto@amacapital.net>
In-Reply-To: <CAMe9rOr_9zsAKMxQaxka8RWCXC8Jc7svdG3tKcp6Q+_EDTC=Zg@mail.gmail.com>
Date:   Fri, 20 Jul 2018 11:35:34 -1000
Cc:     Dave Hansen <dave.hansen@intel.com>,
        Dave Jones <davej@codemonkey.org.uk>,
        "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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To:     "H.J. Lu" <hjl.tools@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
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> On Jul 16, 2018, at 6:05 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>=20
>> On Fri, Jul 13, 2018 at 7:08 PM, Andy Lutomirski <luto@amacapital.net> wr=
ote:
>> I'm not at all convinced that this is the problem, but the series here
>> will give a better diagnostic if the issue really is an IRQ stack
>> overflow:
>>=20
>> https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/log/?h=3Dx=
86/guard_pages
>>=20
>=20
> This kernel won't boot with this configure file.

Bah humbug. You=E2=80=99ll need to turn KASAN off (and maybe even compile it=
 out entirely) if you want to test this. I need to bug the KASAN folks to un=
break their interaction with stacks in vmap space.  It=E2=80=99s been broken=
 literally forever, but I keep incorrectly imagining that it=E2=80=99s been f=
ixed already.

>=20
> --=20
> H.J.
> <config.debug.xz>