Messages in this thread | | | Date | Tue, 8 Apr 2014 18:12:03 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC PATCH 0/5] Use an alternative to _PAGE_PROTNONE for _PAGE_NUMA v2 |
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On Tue, Apr 08, 2014 at 08:22:15AM -0700, 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.
Right; so initially when I started doing the numa scanning thing I implemented b. I've never quite understood why that wasn't chosen; but since Mel already got the PAGE_NUMA bits merged by the time I re-surfaced, I didn't want to argue too much about it.
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