netdev - Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes

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Message-ID: <20080806201401.GA607@linux-os.sc.intel.com>
Date:	Wed, 6 Aug 2008 13:14:02 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Wolfgang Walter <wolfgang.walter@...m.de>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes

On Wed, Aug 06, 2008 at 10:33:25AM -0700, Wolfgang Walter wrote:
> Hello Herbert,
> 
> I think I finally found the problem.
> 
> Here a short description again: all our routers with a via C3 using padlock for AES-encryption are
> crashing with 2.6.26 while they work fine with 2.6.25. Not using padlock
> (i.e. using the i386 assembler version of AES) they just work fine.

Both the padlock version or asm version don't use FP/math registers, right?
It is interesting that you don't see the problem with asm version
but see the problem with padlock version.

Does disabling CONFIG_PREEMPT in 2.6.26 change anything? And also,
can you provide the complete kernel log till the point of failure(oops
that you sent doesn't have the call trace info)

thanks,
suresh
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