Messages in this thread | | | Date | Thu, 6 Nov 2008 16:15:58 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 5/7] x86_64: Support for cpu ops |
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* Christoph Lameter <cl@linux-foundation.org> wrote:
> On Thu, 6 Nov 2008, Ingo Molnar wrote: > > > hm, what happened to the rebase-PDA-to-percpu-area optimization > > patches you guys were working on? I remember there was some > > binutils flakiness - weird crashes and things like that. Did you > > ever manage to stabilize it? It would be sad if only 32-bit could > > take advantage of the optimized ops. > > I thought that was in your tree? I saw a conflict in -next with the > zero based stuff a couple of weeks ago. Mike is working on that > AFAICT.
No, what's in tip/core/percpu is not the PDA patches:
f8d90d9: percpu: zero based percpu build error on s390 cfcfdff: Merge branch 'linus' into core/percpu d379497: Zero based percpu: infrastructure to rebase the per cpu area to zero b3a0cb4: x86: extend percpu ops to 64 bit
But it's not actually utilized on x86. AFAICS you guys never came back with working patches for that (tip/x86/percpu is empty currently), and now i see something related on lkml on a separate track not Cc:-ed to the x86 folks so i thought i'd ask whether more coordination is desired here.
So ... what's the merge plan here? I like your fundamental idea, it's a nice improvement in a couple of areas and i'd like to help out make it happen. Also, the new per-cpu allocator would be nice for the sparseirq code.
Ingo
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