linux-kernel - Re: oops in pgtable_trans_huge

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Date:	Thu, 12 Dec 2013 02:24:22 +0200 (EET)
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Dave Jones <davej@...hat.com>, akpm@...ux-foundation.org
Cc:	Vlastimil Babka <vbabka@...e.cz>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, kirill.shutemov@...ux.intel.com,
	Sasha Levin <sasha.levin@...cle.com>
Subject: Re: oops in pgtable_trans_huge_withdraw

Dave Jones wrote:
> On Wed, Dec 11, 2013 at 04:40:42PM +0100, Vlastimil Babka wrote:
>  > On 12/06/2013 10:02 PM, Dave Jones wrote:
>  > > I've spent a few days enhancing trinity's use of mmap's, trying to make it
>  > > reproduce https://lkml.org/lkml/2013/12/4/499
>  > 
>  > FYI, I managed to reproduce that using trinity today,
>  > trinity was from git at commit e8912cc which is from Dec 09 so I guess 
>  > your enhancements were already there?
> 
> yep, everything I had pending is in HEAD now.
> 
>  > kernel was linux-next-20131209
>  > I was running trinity -c mmap -c munmap -c mremap -c remap_file_pages -c 
>  > mlock -c munlock
>  
> A shorthand for all those -c's is '-G vm'. (Though there might be a couple
> extra syscalls in the list too, madvise, mprotect etc).
> 
>  > Now I'm running with Kirill's patch, will post results later.
>  
> Seemed to fix it for me, I've not reproduced that particular bug since applying it.
> Kirill, is that on its way to Linus soon ?

It's in -mm tree for a week already.

Andrew, could you push it to Linus? More people steps on the bug.

-- 
 Kirill A. Shutemov
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