linux-kernel - Re: 2.6.22.14 oops msg with commvault galaxy ?

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Message-ID: <20071214021433.GA7185@linux.vnet.ibm.com>
Date:	Fri, 14 Dec 2007 07:44:33 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Kay Sievers <kay.sievers@...y.org>, vincent.fortier1@...gc.ca,
	Greg KH <gregkh@...e.de>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>, maneesh@...ibm.com
Subject: Re: 2.6.22.14 oops msg with commvault galaxy ?

On Thu, Dec 13, 2007 at 09:21:26PM +0100, Ingo Molnar wrote:
> 
> * Kay Sievers <kay.sievers@...y.org> wrote:
> 
> > > > > This one also fails to apply properly at the exact same place 
> > > > > has Ingo's previously posted patch.  Would need to backport his 
> > > > > one.
> > > > 
> > > > It depends on a completely reworked sysfs logic, I don't think it 
> > > > makes any sense to backport that.
> > > 
> > > well, if it fixes a live bug in a still supported stable kernel 
> > > release...
> > > 
> > > Vincent, could you try to just get rid of all actual uses of 
> > > se->attr.owner, within fs/sysfs/*.c? Something like the patch below. 
> > > (totally untested - might be fatally broken as well)
> > 
> > How can you think that this is not needed? You can not remove it with 
> > sysfs you are patching. Hope this explains it: 
> > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0ab66088c855eca68513bdd7442a426c4b374ced
> 
> yeah - as i said it might be fatally broken (in fact it is). Do we 
> understand why Vincent got the crashes with vanilla 2.6.22.14 ?
> 

My guess is some variables have probably been left uninitialized. I am a
bit too scared to look into sysfs parts of the code now.

-- 
regards,
Dhaval
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