Messages in this thread | | | Date | Fri, 8 Aug 2008 12:32:53 -0700 | From | Suresh Siddha <> | Subject | Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes |
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On Fri, Aug 08, 2008 at 12:09:46PM -0700, Wolfgang Walter wrote: > I don't know though why kernel_fpu_begin exactly fixes the problem:
because it prevents taking a DNA fault inside the kernel (resulting in TS_USEDFPU not set).
> > Maybe preemption must be disabled when padlocks RNG, ACE, Hash-engine etc. is > used. Maybe just some barrier is needed which preempt_disable provides.
problem can happen even when preemption is disabled.
> What should I do now?
I will post your fix(including the other usages) with the appropriate changelog shortly.
thanks, suresh
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