linux-kernel - Re: linux-next: kernel BUG at mm/slub.c:1447!

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Message-ID: <560E8879.6050808@roeck-us.net>
Date:	Fri, 2 Oct 2015 06:36:57 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-mm@...ck.org, Michal Hocko <mhocko@...e.cz>,
	Dave Chinner <david@...morbit.com>
Subject: Re: linux-next: kernel BUG at mm/slub.c:1447!

On 10/01/2015 01:49 PM, Andrew Morton wrote:
> On Thu, 1 Oct 2015 09:06:15 -0700 Guenter Roeck <linux@...ck-us.net> wrote:
>
>> Seen with next-20151001, running qemu, simulating Opteron_G1 with a non-SMP configuration.
>> On a re-run, I have seen it with the same image, but this time when simulating IvyBridge,
>> so it is not CPU dependent. I did not previously see the problem.
>>
>> Log is at
>> http://server.roeck-us.net:8010/builders/qemu-x86-next/builds/259/steps/qemubuildcommand/logs/stdio
>>
>> I'll try to bisect. The problem is not seen with every boot, so that may take a while.
>
> Caused by mhocko's "mm, fs: obey gfp_mapping for add_to_page_cache()",
> I expect.
>
I tried to bisect to be sure, but the problem doesn't happen often enough, and I got some
false negatives. I assume bisect is no longer necessary. If I need to try again, please
let me know.

Thanks,
Guenter

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