linux-kernel - Re: [PATCH 05/10] block: remove per-queue plugging

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Date:	Tue, 08 Mar 2011 16:36:32 -0500
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Jens Axboe <jaxboe@...ionio.com>
Cc:	Mike Snitzer <snitzer@...hat.com>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"hch\@infradead.org" <hch@...radead.org>
Subject: Re: [PATCH 05/10] block: remove per-queue plugging

Jens Axboe <jaxboe@...ionio.com> writes:

> On 2011-03-08 21:21, Mike Snitzer wrote:
>> On Tue, Mar 08 2011 at  7:16am -0500,
>> Jens Axboe <jaxboe@...ionio.com> wrote:
>> 
>>> On 2011-03-03 23:13, Mike Snitzer wrote:
>>>> I'm now hitting a lockdep issue, while running a 'for-2.6.39/stack-plug'
>>>> kernel, when I try an fsync heavy workload to a request-based mpath
>>>> device (the kernel ultimately goes down in flames, I've yet to look at
>>>> the crashdump I took)
>>>
>>> Mike, can you re-run with the current stack-plug branch? I've fixed the
>>> !CONFIG_BLOCK and rebase issues, and also added a change for this flush
>>> on schedule event. It's run outside of the runqueue lock now, so
>>> hopefully that should solve this one.
>> 
>> Works for me, thanks.
>
> Super, thanks! Out of curiousity, did you use dm/md?

mm/memory-failure.c: In function 'hwpoison_user_mappings':
mm/memory-failure.c:948: error: implicit declaration of function 'lock_page_nosync'

You missed a conversion of lock_page_nosync -> lock_page.

Cheers,
Jeff
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