From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932749Ab3CVLEg (ORCPT ); Fri, 22 Mar 2013 07:04:36 -0400 Received: from mail-qa0-f48.google.com ([209.85.216.48]:51719 "EHLO mail-qa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932245Ab3CVLEe (ORCPT ); Fri, 22 Mar 2013 07:04:34 -0400 MIME-Version: 1.0 In-Reply-To: <1363809337-29718-1-git-send-email-riel@surriel.com> References: <1363809337-29718-1-git-send-email-riel@surriel.com> Date: Fri, 22 Mar 2013 18:04:33 +0700 Message-ID: Subject: Re: ipc,sem: sysv semaphore scalability From: Emmanuel Benisty To: Rik van Riel Cc: torvalds@linux-foundation.org, davidlohr.bueso@hp.com, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, hhuang@redhat.com, jason.low2@hp.com, walken@google.com, lwoodman@redhat.com, chegu_vinod@hp.com Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rik, On Thu, Mar 21, 2013 at 2:55 AM, 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. I was trying your patchset and my machine died while building a package. I could reproduce the bug the (only) two times I tried. There's a poor quality picture here: http://i.imgur.com/MuYuyQC.jpg Thanks. -- Emmanuel