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From: Sasha Levin <sasha.levin@oracle.com>
To: Chuck Ebbert <cebbert.lkml@gmail.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: pipe/page fault oddness.
Date: Thu, 02 Oct 2014 10:49:13 -0400	[thread overview]
Message-ID: <542D65E9.7020207@oracle.com> (raw)
In-Reply-To: <20141002030300.1d2788ca@as>

On 10/02/2014 04:03 AM, Chuck Ebbert wrote:
> On Wed, 01 Oct 2014 23:32:15 -0400
> Sasha Levin <sasha.levin@oracle.com> wrote:
> 
>> On 10/01/2014 06:28 PM, Chuck Ebbert wrote:
>>> On Wed, 01 Oct 2014 18:08:30 -0400
>>> Sasha Levin <sasha.levin@oracle.com> wrote:
>>>
>>>>> On 10/01/2014 04:20 PM, Linus Torvalds wrote:
>>>>>>> So I'm really sending this patch out in the hope that it will get
>>>>>>> comments, fixup and possibly even testing by people who actually know
>>>>>>> the NUMA balancing code. Rik?  Anybody?
>>>>>
>>>>> Hi Linus,
>>>>>
>>>>> I've tried this patch on the same configuration that was triggering
>>>>> the VM_BUG_ON that Hugh mentioned previously. Surprisingly enough it
>>>>> ran fine for ~20 minutes before exploding with:
>>>>>
>>>>> [ 2781.566206] kernel BUG at mm/huge_memory.c:1293!
>>> That's:
>>> 	BUG_ON(is_huge_zero_page(page));
>>>
>>> Can you change your scripts to show the source code line when
>>> the error is a BUG_ON()? The machine code disassembly after the
>>> oops message doesn't really help.
>>>
>>
>> Hum? The source code line is the first line in the trace:
>>
>> 	[ 2781.566206] kernel BUG at mm/huge_memory.c:1293!
>>
> 
> I meant, display the contents of that line so we can see what the
> BUG_ON() was triggered by. In some cases you might have a custom patch
> applied or be running a version that some people don't have handy.

Ah, the actual content? That's a good point - let me look into that.


Thanks,
Sasha


  reply	other threads:[~2014-10-02 14:49 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-30  3:33 pipe/page fault oddness Dave Jones
2014-09-30  4:27 ` Linus Torvalds
2014-09-30  4:33   ` Dave Jones
     [not found]     ` <CA+55aFwxdOBKHwwp7Zq1k19mHCyHYmYqigCVt59AtB-P7Zva1w@mail.gmail.com>
2014-09-30 15:52       ` Linus Torvalds
2014-09-30 16:03         ` Rik van Riel
2014-09-30 16:07           ` Dave Jones
2014-09-30 16:26           ` Linus Torvalds
2014-09-30 16:05         ` Dave Jones
2014-09-30 16:10           ` Linus Torvalds
2014-09-30 16:22             ` Dave Jones
2014-09-30 16:40               ` Dave Jones
2014-09-30 16:46                 ` Linus Torvalds
2014-09-30 18:20                   ` Dave Jones
2014-09-30 18:58                     ` Linus Torvalds
2014-10-01  8:19                       ` Hugh Dickins
2014-10-01 16:01                         ` Linus Torvalds
2014-10-01 16:18                           ` Linus Torvalds
2014-10-01 17:29                             ` Rik van Riel
2014-10-02  8:28                               ` Peter Zijlstra
2014-10-01 20:20                             ` Linus Torvalds
2014-10-01 21:09                               ` Rik van Riel
2014-10-01 22:08                               ` Sasha Levin
2014-10-01 22:28                                 ` Chuck Ebbert
2014-10-02  3:32                                   ` Sasha Levin
2014-10-02  8:03                                     ` Chuck Ebbert
2014-10-02 14:49                                       ` Sasha Levin [this message]
2014-10-01 22:42                                 ` Linus Torvalds
2014-10-02 14:25                                   ` Kirill A. Shutemov
2014-10-02 16:01                                     ` Linus Torvalds
2014-10-02 16:35                                       ` Kirill A. Shutemov
2014-10-02 15:04                                   ` Sasha Levin
2014-10-02 16:10                                     ` Linus Torvalds
2014-10-03  5:00                                       ` Sasha Levin
2014-10-03 15:43                                         ` Linus Torvalds
2014-10-03 15:58                                           ` Dave Jones
2014-10-03 16:02                                             ` Sasha Levin
2014-10-02 12:45                             ` Mel Gorman
2014-10-06 19:18                               ` Aneesh Kumar K.V
2014-10-07 12:45                                 ` Linus Torvalds
2014-10-08 10:37                                   ` Aneesh Kumar K.V
2014-10-02  8:47                           ` Hugh Dickins
2014-10-02 15:57                             ` Linus Torvalds
2014-09-30  4:35   ` Al Viro

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