linux-kernel - Re: MPTSAS problems in 2.6.26-rc2-mm1

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Message-ID: <483D729B.1000706@linux.vnet.ibm.com>
Date:	Wed, 28 May 2008 20:26:27 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-scsi@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>
Subject: Re: MPTSAS problems in 2.6.26-rc2-mm1

James Bottomley wrote:
> On Wed, 2008-05-28 at 11:45 +0200, Peter Zijlstra wrote:
>> On Wed, 2008-05-28 at 15:11 +0530, Balbir Singh wrote:
>>> I have 2.6.26-rc2-mm1 with Rik's splitvm patches. While booting the kernel, I
>>> ran into the following. I searched my email quickly to see that no one else has
>>> reported this problem. Lockdep seems to be complaining about the same lock being
>>> held at the same location (the message is a bit confusing to me).
>> looks like device_add() recursing - most likely with a different device
>> though.
> 
> This is another instance of a problem being caused by semaphore to mutex
> conversion in struct class;
> 
> There's another thread on this here:
> 
> http://marc.info/?t=121074904600001

Thanks for pointer, it does indeed look like a variant of the same problem

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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