linux-kernel - Re: 3.15.0-rc6: VM_BUG_ON_PAGE(PageTail(page), page)

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Message-ID: <537F5320.6070402@oracle.com>
Date:	Fri, 23 May 2014 09:54:40 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
CC:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: 3.15.0-rc6: VM_BUG_ON_PAGE(PageTail(page), page)

On 05/23/2014 05:16 AM, Kirill A. Shutemov wrote:
> On Fri, May 23, 2014 at 12:21:47AM -0400, Sasha Levin wrote:
>> On 05/22/2014 09:58 AM, Dave Jones wrote:
>>> Not sure if Sasha has already reported this on -next (It's getting hard
>>> to keep track of all the VM bugs he's been finding), but I hit this overnight
>>> on .15-rc6.  First time I've seen this one.
>>
>> Unfortunately I had to disable transhuge/hugetlb in my testing .config since
>> the open issues in -next get hit pretty often, and were unfixed for a while
>> now.
> 
> What THP-related is not fixed by now? collapse hung? what else?

Besides the collapse hang, we have this: https://lkml.org/lkml/2013/3/29/103 .

I know it's not a "real" bug, but DEBUG_PAGEALLOC misbehaving, but it's
still something that makes testing difficult.


Thanks,
Sasha
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