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Date:   Wed, 27 Jan 2021 12:04:54 +0200
From:   Mike Rapoport <rppt@linux.ibm.com>
To:     =?utf-8?Q?=C5=81ukasz?= Majczak <lma@semihalf.com>
Cc:     Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org,
        =?utf-8?B?UmFkb3PFgmF3?= Biernacki <rad@semihalf.com>,
        Marcin Wojtas <mw@semihalf.com>,
        Alex Levin <levinale@google.com>,
        Guenter Roeck <groeck@google.com>,
        Jesse Barnes <jsbarnes@google.com>,
        Chris Wilson <chris@chris-wilson.co.uk>,
        "Sarvela, Tomi P" <tomi.p.sarvela@intel.com>
Subject: Re: PROBLEM: Crash after mm: fix initialization of struct page for
 holes in memory layout
Message-ID: <20210127100454.GK196782@linux.ibm.com>
References: <CAFJ_xbqT8h2Exix3S6AGgB7W1N0u-=WKffAyb7Hk9-8K8FBwKA@mail.gmail.com>
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Hi Lukasz,

On Wed, Jan 27, 2021 at 10:22:29AM +0100, Łukasz Majczak wrote:
> Crash after mm: fix initialization of struct page for holes in memory layout
> 
> Hi,
> I was trying to run v5.11-rc5 on my Samsung Chromebook Pro (Caroline),
> but I've noticed it has crashed - unfortunately it seems to happen at
> a very early stage - No output to the console nor to the screen, so I
> have started a bisect (between 5.11-rc4 - which works just find - and
> 5.11-rc5),
> bisect results points to:
> 
> d3921cb8be29 mm: fix initialization of struct page for holes in memory layout
> 
> Reproduction is just to build and load the kernel.
> 
> If it will help any how I am attaching:
> - /proc/cpuinfo (from healthy system):
> https://gist.github.com/semihalf-majczak-lukasz/3517867bf39f07377c1a785b64a97066
> - my .config file (for a broken system):
> https://gist.github.com/semihalf-majczak-lukasz/584b329f1bf3e43b53efe8e18b5da33c
> 
> If there is anything I could add/do/test to help fix this please let me know.

Chris Wilson also reported boot failures on several Chromebooks:

https://lore.kernel.org/lkml/161160687463.28991.354987542182281928@build.alporthouse.com

I presume serial console is not an option, so if you could boot with
earlyprintk=vga and see if there is anything useful printed on the screen
it would be really helpful.

> Best regards
> Lukasz

-- 
Sincerely yours,
Mike.