Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 11 Aug 2017 09:16:29 -0700 | Subject | Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush |
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On Fri, Aug 11, 2017 at 2:03 AM, Peter Zijlstra <peterz@infradead.org> wrote: > > I'm sure we talked about using HAVE_RCU_TABLE_FREE for x86 (and yes that > would make it work again), but this was some years ago and I cannot > readily find those emails.
I think the only time we really talked about HAVE_RCU_TABLE_FREE for x86 (at least that I was cc'd on) was not because of RCU freeing, but because we just wanted to use the generic page table lookup code on x86 *despite* not using RCU freeing.
And we just ended up renaming HAVE_GENERIC_RCU_GUP as HAVE_GENERIC_GUP.
There was only passing mention of maybe making x86 use RCU, but the discussion was really about why the IF flag meant that x86 didn't need to, iirc.
I don't recall us ever discussing *really* making x86 use RCU.
Linus
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