Re: [RFC PATCH v2] membarrier: expedited private command
From: Peter Zijlstra
Date: Sat Jul 29 2017 - 06:52:51 EST
On Sat, Jul 29, 2017 at 07:48:56PM +1000, Nicholas Piggin wrote:
> On Sat, 29 Jul 2017 19:45:43 +1000
> Nicholas Piggin <npiggin@xxxxxxxxx> wrote:
>
> > hmm, we might be able to restrict iteration
> > to mm_cpumask(current->mm), no?
>
> Oh that's been discussed too. I'll read back over it too.
Right, the main problem is that some architectures (arm64 for instance,
although Will is looking at it) don't use mm_cpumask() at all.
Other architectures (PPC for instance) only ever set bits.