Messages in this thread | | | Date | Tue, 08 Apr 2014 09:04:41 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC PATCH 0/5] Use an alternative to _PAGE_PROTNONE for _PAGE_NUMA v2 |
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On 04/08/2014 08:22 AM, Linus Torvalds wrote: > On Tue, Apr 8, 2014 at 7:40 AM, H. Peter Anvin <hpa@zytor.com> wrote: >> >> David, is your patchset going to be pushed in this merge window as expected? > > Apparently aiming for 3.16 right now. > >> That being said, these bits are precious, and if this ends up being a >> case where "only Xen needs another bit" once again then Xen should >> expect to get kicked to the curb at a moment's notice. > > Quite frankly, I don't think it's a Xen-only issue. The code was hard > to figure out even without the Xen issues. For example, nobody ever > explained to me why it > > (a) could be the same as PROTNONE on x86 > (b) could not be the same as PROTNONE in general > > I think the best explanation for it so far was from the little voices > in my head that sang "It's a kind of Magic", and that isn't even > remotely the best song by Queen. >
Yes, I was hoping that the timing would work out so we could evict bit 10 (which *is* a Xen-only issue) and then reuse it. I don't think the NUMA bit is Xen-only.
-hpa
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