linux-kernel - Re: bisected crash due to "x86: Move swiotlb initialization before dma32_free

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Message-ID: <20091215114351.GA32722@elte.hu>
Date:	Tue, 15 Dec 2009 12:43:51 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>, rdreier@...co.com,
	linux-kernel@...r.kernel.org,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: bisected crash due to "x86: Move swiotlb initialization before
 dma32_free_bootmem"


* Yinghai Lu <yinghai@...nel.org> wrote:

> FUJITA Tomonori wrote:
> > On Tue, 15 Dec 2009 11:56:50 +0100
> > Ingo Molnar <mingo@...e.hu> wrote:
> > 
> >> * FUJITA Tomonori <fujita.tomonori@....ntt.co.jp> wrote:
> >>
> >>> There are a few people who hit this. How many people use a box with over 
> >>> 256GB memory?
> >>>
> >>> And you can work around this with "dma32_size" kernel boot option.
> >> Well, since the kernel has not crashed before this change there's really just 
> >> two options as per upstream kernel regression policy: either we fix it or we 
> >> revert it.
> > 
> > As I wrote, here is a patch that can be applied to cleanly to the git
> > head:
> > 
> > http://www.kernel.org/pub/linux/kernel/people/tomo/misc/0001-x86-two-stage-swiotlb-initialization.patch
> > 
> > It fixes the problem. Yinghai, can you test it? It should work but
> > it's good to confirm it.
> 
> i tested already, it works.

Ok, mind someone please resend the agreed-upon patch with a Tested-by/Acked-by 
line so that i can apply it?

Thanks,

	Ingo
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