linux-kernel - Re: Current mainline git (24e700e291d52bd2) hangs when building e.g. perf

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Message-ID: <20170908215656.qw66lgfsfgpoqrdm@pd.tnic>
Date:   Fri, 8 Sep 2017 23:56:56 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:     Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: Current mainline git (24e700e291d52bd2) hangs when building e.g.
 perf

On Fri, Sep 08, 2017 at 02:47:00PM -0700, Andy Lutomirski wrote:
> Any chance you could test with CONFIG_DEBUG_VM=y?  There are lots of
> potentially useful assertions in that code.
> 
> Can you also post your /proc/cpuinfo?  And can you re-confirm that a
> problematic guest kernel is causing problems in the *host*?

Also, have you seen any MCEs during early boot, after the freezes?

You probably wouldn't have because we don't log them on F10h due to
broken BIOSen. So add "mce=bootlog" to your grub and warm-reset your box
after one of those freezes and send me dmesg. It should have an MCE in
there, if it happens what I think it happens.

Thx.

-- 
Regards/Gruss,
    Boris.

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