[PATCH 3/6] KVM: PPC: Book3E: Increase FPU laziness

Caraman Mihai Claudiu-B02008 B02008 at freescale.com
Wed Jul 3 23:55:43 EST 2013


> -----Original Message-----
> From: Alexander Graf [mailto:agraf at suse.de]
> Sent: Wednesday, July 03, 2013 4:45 PM
> To: Caraman Mihai Claudiu-B02008
> Cc: kvm-ppc at vger.kernel.org; kvm at vger.kernel.org; linuxppc-
> dev at lists.ozlabs.org
> Subject: Re: [PATCH 3/6] KVM: PPC: Book3E: Increase FPU laziness
> 
> 
> On 03.07.2013, at 14:42, Mihai Caraman wrote:
> 
> > Increase FPU laziness by calling kvmppc_load_guest_fp() just before
> > returning to guest instead of each sched in. Without this improvement
> > an interrupt may also claim floting point corrupting guest state.
> 
> Not sure I follow. Could you please describe exactly what's happening?

This was already discussed on the list, I will forward you the thread.

-Mike



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