RFC: AArch64: Implementing spin pauses with ISB

[Andrew Haley]

On 8/18/21 10:18 AM, Andrew Haley wrote:
> Anyway, OK, we could do this, if we at least had the opportunity to switch
> to PAUSE with an command-line option. And be aware that at any time any
> manufacturer could mess this up, so it's dangerous to have it on by default.

Sorry, that's ambiguous.

I mean, it's fine to support spin pauses with USB, but please support PAUSE
as well, and I'm not keen on having it on by default. Maybe on Neoverse N1
we could do that, but it might make things worse in some cases; and how would
we know?

-- 
Andrew Haley  (he/him)
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
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