Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757610Ab3C3CIf (ORCPT ); Fri, 29 Mar 2013 22:08:35 -0400 Received: from g4t0016.houston.hp.com ([15.201.24.19]:44836 "EHLO g4t0016.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756147Ab3C3CId (ORCPT ); Fri, 29 Mar 2013 22:08:33 -0400 Message-ID: <1364609309.1818.8.camel@buesod1.americas.hpqcorp.net> Subject: Re: ipc,sem: sysv semaphore scalability From: Davidlohr Bueso To: Emmanuel Benisty Cc: Linus Torvalds , Dave Jones , Andrew Morton , Rik van Riel , Linux Kernel Mailing List , hhuang@redhat.com, "Low, Jason" , Michel Lespinasse , Larry Woodman , "Vinod, Chegu" , Peter Hurley Date: Fri, 29 Mar 2013 19:08:29 -0700 In-Reply-To: References: <1363809337-29718-1-git-send-email-riel@surriel.com> <20130321141058.76e028e492f98f6ee6e60353@linux-foundation.org> <20130326192852.GA25899@redhat.com> <20130326124309.077e21a9f59aaa3f3355e09b@linux-foundation.org> <20130329161746.GA8391@redhat.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4 (3.4.4-2.fc17) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1617 Lines: 34 On Sat, 2013-03-30 at 08:36 +0700, Emmanuel Benisty wrote: > Hi Linus, > > On Sat, Mar 30, 2013 at 6:16 AM, Linus Torvalds > wrote: > > Emmanuel, can you try the attached patch? I think it applies cleanly > > on top of the scalability series too without any changes, but I didn't > > check if the patches perhaps changed some of the naming or something. > > I had to slightly modify the patch since it wouldn't match the changes > introduced by 7-7-ipc-sem-fine-grained-locking-for-semtimedop.patch, > hope that was the right thing to do. So, what I tried was: original 7 > patches + the one liner + your patch blindly modified by me on the top > of 3.9-rc4 and I'm still having twilight zone issues. Not sure which one liner you refer to, but, if you haven't already done so, please try with these fixes (queued in linux-next): http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=a9cead0347283f3e72a39e7b76a3cc479b048e51 http://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=4db64b89525ac357cba754c3120065adddd9ec31 I've been trying to reproduce your twilight zone problem on five different machines now without any luck. Is there anything you're doing to trigger the issue? Does the machine boot ok and then do weird things, say after X starts, open some program, etc? Thanks, Davidlohr -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/