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

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To: Suresh Siddha <suresh.b.siddha@...>
Cc: H. Peter Anvin <hpa@...>, Wolfgang Walter <wolfgang.walter@...>, netdev@vger.kernel.org <netdev@...>, linux-kernel@vger.kernel.org <linux-kernel@...>, Ingo Molnar <mingo@...>, viro@ZenIV.linux.org.uk <viro@...>, vegard.nossum@gmail.com <vegard.nossum@...>
Date: Friday, August 8, 2008 - 8:38 pm

On Fri, Aug 08, 2008 at 04:11:21PM -0700, Suresh Siddha wrote:

Someone please test this with tcrypt mode=200 with and without
the patch.

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.

If the degradation is small then I'll push it to Linus.

Thanks,
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Re: Kernel oops with 2.6.26, padlock and ipsec: probably pro..., Herbert Xu, (Fri Aug 8, 8:38 pm)