From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f53.google.com (mail-pb0-f53.google.com [209.85.160.53]) by kanga.kvack.org (Postfix) with ESMTP id 8D4B86B0117 for ; Wed, 6 Nov 2013 16:42:08 -0500 (EST) Received: by mail-pb0-f53.google.com with SMTP id up7so103548pbc.26 for ; Wed, 06 Nov 2013 13:42:08 -0800 (PST) Received: from psmtp.com ([74.125.245.176]) by mx.google.com with SMTP id bc2si521762pad.100.2013.11.06.13.42.06 for ; Wed, 06 Nov 2013 13:42:06 -0800 (PST) Message-ID: <1383774119.13330.2.camel@buesod1.americas.hpqcorp.net> Subject: Re: [PATCH v3 0/4] MCS Lock: MCS lock code cleanup and optimizations From: Davidlohr Bueso Date: Wed, 06 Nov 2013 13:41:59 -0800 In-Reply-To: <1383773816.11046.352.camel@schen9-DESK> References: <1383773816.11046.352.camel@schen9-DESK> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Tim Chen Cc: Ingo Molnar , Andrew Morton , Thomas Gleixner , linux-kernel@vger.kernel.org, linux-mm , linux-arch@vger.kernel.org, Linus Torvalds , Waiman Long , Andrea Arcangeli , Alex Shi , Andi Kleen , Michel Lespinasse , Davidlohr Bueso , Matthew R Wilcox , Dave Hansen , Peter Zijlstra , Rik van Riel , Peter Hurley , "Paul E.McKenney" , Raghavendra K T , George Spelvin , "H. Peter Anvin" , Arnd Bergmann , Aswin Chandramouleeswaran , Scott J Norton , Will Deacon , "Figo.zhang" On Wed, 2013-11-06 at 13:36 -0800, Tim Chen wrote: > In this patch series, we separated out the MCS lock code which was > previously embedded in the mutex.c. This allows for easier reuse of > MCS lock in other places like rwsem and qrwlock. We also did some micro > optimizations and barrier cleanup. > > This patches were previously part of the rwsem optimization patch series > but now we spearate them out. > > Tim Chen > > v3: > 1. modified memory barriers to support non x86 architectures that have > weak memory ordering. > > v2: > 1. change export mcs_spin_lock as a GPL export symbol > 2. corrected mcs_spin_lock to references > > > Jason Low (2): > MCS Lock: optimizations and extra comments > MCS Lock: Barrier corrections > > > Jason Low (2): > MCS Lock: optimizations and extra comments > MCS Lock: Barrier corrections > > Tim Chen (1): > MCS Lock: Restructure the MCS lock defines and locking code into its > own file > > Waiman Long (2): > MCS Lock: Make mcs_spinlock.h includable in other files > MCS Lock: Allow architecture specific memory barrier in lock/unlock > > arch/x86/include/asm/barrier.h | 6 +++ > include/linux/mcs_spinlock.h | 25 ++++++++++ > include/linux/mutex.h | 5 +- > kernel/Makefile | 6 +- > kernel/mcs_spinlock.c | 96 ++++++++++++++++++++++++++++++++++++++++ > kernel/mutex.c | 60 +++---------------------- > 6 files changed, 140 insertions(+), 58 deletions(-) > create mode 100644 include/linux/mcs_spinlock.h > create mode 100644 kernel/mcs_spinlock.c Hmm I noticed that Peter's patchset to move locking mechanisms into a unique directory is now in -tip, ie: http://marc.info/?l=linux-kernel&m=138373682928585 So we'll have problems applying this patchset, it would probably be best to rebase on top. Thanks, Davidlohr -- 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