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

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Message-ID: <20080809174821.GC13158@linux-os.sc.intel.com>
Date:	Sat, 9 Aug 2008 10:48:21 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Wolfgang Walter <wolfgang.walter@...m.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	"viro@...IV.linux.org.uk" <viro@...IV.linux.org.uk>,
	"vegard.nossum@...il.com" <vegard.nossum@...il.com>
Subject: Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes

On Fri, Aug 08, 2008 at 05:38:30PM -0700, Herbert Xu wrote:
> On Fri, Aug 08, 2008 at 04:11:21PM -0700, Suresh Siddha wrote:
> >
> > As I can't test, can you please test this and Ack.
> 
> Someone please test this with tcrypt mode=200 with and without
> the patch.

Yes. I mean both perf and stability tests when I meant by "test".

> If there is a significant degradation I suggest that we back out
> the FPU changes.  Making your competitor's processor go slow is
> not a nice thing to do, especially when you've just released a
> processor in the same space.

Please be assured that I would like to close/adddress all the perf and
stability issues and it doesn't matter whose processor it is ;)
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