From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <491310E1.1080002@sgi.com> Date: Thu, 06 Nov 2008 07:44:33 -0800 From: Mike Travis MIME-Version: 1.0 Subject: Re: [patch 5/7] x86_64: Support for cpu ops References: <20081105231634.133252042@quilx.com> <20081105231649.108433550@quilx.com> <20081106071206.GH15731@elte.hu> <20081106151558.GB1644@elte.hu> In-Reply-To: <20081106151558.GB1644@elte.hu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Ingo Molnar Cc: Christoph Lameter , akpm@linux-foundation.org, Pekka Enberg , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Stephen Rothwell , Vegard Nossum List-ID: Ingo Molnar wrote: > * Christoph Lameter 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 Sorry, this was on my plate but the 4096 cpus if far more critical to get released and available. As soon as that's finally done, I can get back to the pda/zero-based changes. Thanks, Mike -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org