Re: [PATCH 0/3] context_tracking: streamline code, avoid IRQ save/restore

From: Paolo Bonzini
Date: Tue Oct 27 2015 - 22:05:39 EST

On 28/10/2015 02:39, Paolo Bonzini wrote:
> The first two of these patches were posted last February, the last one
> is new. Rik's old measurements were that it shaved around .3 microseconds
> on each iteration of his KVM benchmark.
> I guess three days before the start of the merge window is not
> the best time to post patches. However, I brought this series up at
> kernel summit yesterday, and Andy's cleanups actually makes it trivial
> to apply this to syscall entry. So here it is, perhaps it's worth it.
> Assuming it works, of course, because this is compile-tested only. :)

Heh, Andy said it doesn't. :)

However, we could still merge the first two patches for 4.4 since they
have been tested. I can even take them myself if I get Acked-by. The
third one will have to wait for 4.5.


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