From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510Ab3CUVuO (ORCPT ); Thu, 21 Mar 2013 17:50:14 -0400 Received: from mailout01.c08.mtsvc.net ([205.186.168.189]:40913 "EHLO mailout01.c08.mtsvc.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751439Ab3CUVuM (ORCPT ); Thu, 21 Mar 2013 17:50:12 -0400 Message-ID: <1363902605.4488.33.camel@thor.lan> Subject: Re: ipc,sem: sysv semaphore scalability From: Peter Hurley To: Andrew Morton Cc: Rik van Riel , torvalds@linux-foundation.org, davidlohr.bueso@hp.com, linux-kernel@vger.kernel.org, hhuang@redhat.com, jason.low2@hp.com, walken@google.com, lwoodman@redhat.com, chegu_vinod@hp.com, Dave Jones Date: Thu, 21 Mar 2013 17:50:05 -0400 In-Reply-To: <20130321141058.76e028e492f98f6ee6e60353@linux-foundation.org> References: <1363809337-29718-1-git-send-email-riel@surriel.com> <20130321141058.76e028e492f98f6ee6e60353@linux-foundation.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.6.3-0pjh1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Authenticated-User: 125194 peter@hurleysoftware.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2013-03-21 at 14:10 -0700, Andrew Morton wrote: > On Wed, 20 Mar 2013 15:55:30 -0400 Rik van Riel wrote: > > > This series makes the sysv semaphore code more scalable, > > by reducing the time the semaphore lock is held, and making > > the locking more scalable for semaphore arrays with multiple > > semaphores. > > > > The first four patches were written by Davidlohr Buesso, and > > reduce the hold time of the semaphore lock. > > > > The last three patches change the sysv semaphore code locking > > to be more fine grained, providing a performance boost when > > multiple semaphores in a semaphore array are being manipulated > > simultaneously. > > These patches conflict pretty badly with Peter's: On one point I'm a little confused: my series has been in linux-next for a while. On what tree is this series based?