linux-kernel - Re: dmsetup fails on latest kernel

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Message-ID: <4F187D54.602@zytor.com>
Date:	Thu, 19 Jan 2012 12:30:12 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	"Kasatkin, Dmitry" <dmitry.kasatkin@...el.com>,
	device-mapper development <dm-devel@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: dmsetup fails on latest kernel

On 01/19/2012 12:17 PM, Linus Torvalds wrote:
> On Thu, Jan 19, 2012 at 12:13 PM, H. Peter Anvin <hpa@...or.com> wrote:
>> Could you please send me:
>>
>> a) your full strace;
>> b) arch/x86/kernel/syscall_32.o from your build?
> 
> Btw, the strace before-and-after (working vs nonworking) would
> probably be useful. They aren't easily comparable (all the random
> pointers change depending on allocations etc), but some scripting and
> editing out pointer values might make the difference be obvious.
> 
>                          Linus

Possible.  I have actually reproduced it and reduced it to a small test
case already, so I hopefully will have it nailed down soon.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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