From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 6 Nov 2008 16:15:58 +0100 From: Ingo Molnar Subject: Re: [patch 5/7] x86_64: Support for cpu ops Message-ID: <20081106151558.GB1644@elte.hu> References: <20081105231634.133252042@quilx.com> <20081105231649.108433550@quilx.com> <20081106071206.GH15731@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: akpm@linux-foundation.org, Pekka Enberg , linux-kernel@vger.kernel.org, linux-mm@kvack.org, travis@sgi.com, Stephen Rothwell , Vegard Nossum List-ID: * 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 -- 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