Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [patch V4 4/8] sched: Make migrate_disable/enable() independent of RT | Date | Mon, 23 Nov 2020 22:25:24 +0100 |
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On Mon, Nov 23 2020 at 22:15, Thomas Gleixner wrote: > On Sun, Nov 22 2020 at 15:16, Andy Lutomirski wrote: >> On Fri, Nov 20, 2020 at 1:29 AM Peter Zijlstra <peterz@infradead.org> wrote: >> The common case of a CPU switching back and forth between a small >> number of mms would have no significant overhead. > > For CPUs which do not support PCID this sucks, which is everything pre > Westmere and all of 32bit. Yes, 32bit. If we go there then 32bit has to > bite the bullet and use the very same mechanism. Not that I care much > TBH.
Bah, I completely forgot that AMD does not support PCID before Zen3 which is a major showstopper.
Thanks,
tglx
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