From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751722Ab0CWSXE (ORCPT ); Tue, 23 Mar 2010 14:23:04 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:48412 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750864Ab0CWSXA (ORCPT ); Tue, 23 Mar 2010 14:23:00 -0400 Date: Tue, 23 Mar 2010 11:21:41 -0700 From: Andrew Morton To: Anton Starikov Cc: Ingo Molnar , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org, Peter Zijlstra Subject: Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance Message-Id: <20100323112141.7f248f2b.akpm@linux-foundation.org> In-Reply-To: <15090451-C292-44D6-B2BA-DCBCBEEF429D@gmail.com> References: <20100323102208.512c16cc.akpm@linux-foundation.org> <20100323173409.GA24845@elte.hu> <20100323180002.GA2965@elte.hu> <15090451-C292-44D6-B2BA-DCBCBEEF429D@gmail.com> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.9; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 23 Mar 2010 19:03:36 +0100 Anton Starikov wrote: > > On Mar 23, 2010, at 7:00 PM, Ingo Molnar wrote: > >> NOTE! None of those are in 2.6.33 - they were merged afterwards. But they > >> are in 2.6.34-rc1 (and obviously current -git). So Anton would have to > >> compile his own kernel to test his load. > > > > another option is to run the rawhide kernel via something like: > > > > yum update --enablerepo=development kernel > > > > this will give kernel-2.6.34-0.13.rc1.git1.fc14.x86_64, which has those > > changes included. > > I will apply this commits to 2.6.32, I afraid current OFED (which I need also) will not work on 2.6.33+. > You should be able to simply set CONFIG_RWSEM_GENERIC_SPINLOCK=n, CONFIG_RWSEM_XCHGADD_ALGORITHM=y by hand, as I mentioned earlier? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 37BF06B01BF for ; Tue, 23 Mar 2010 14:23:01 -0400 (EDT) Date: Tue, 23 Mar 2010 11:21:41 -0700 From: Andrew Morton Subject: Re: [Bugme-new] [Bug 15618] New: 2.6.18->2.6.32->2.6.33 huge regression in performance Message-Id: <20100323112141.7f248f2b.akpm@linux-foundation.org> In-Reply-To: <15090451-C292-44D6-B2BA-DCBCBEEF429D@gmail.com> References: <20100323102208.512c16cc.akpm@linux-foundation.org> <20100323173409.GA24845@elte.hu> <20100323180002.GA2965@elte.hu> <15090451-C292-44D6-B2BA-DCBCBEEF429D@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Anton Starikov Cc: Ingo Molnar , Linus Torvalds , linux-mm@kvack.org, linux-kernel@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org, Peter Zijlstra List-ID: On Tue, 23 Mar 2010 19:03:36 +0100 Anton Starikov wrote: > > On Mar 23, 2010, at 7:00 PM, Ingo Molnar wrote: > >> NOTE! None of those are in 2.6.33 - they were merged afterwards. But they > >> are in 2.6.34-rc1 (and obviously current -git). So Anton would have to > >> compile his own kernel to test his load. > > > > another option is to run the rawhide kernel via something like: > > > > yum update --enablerepo=development kernel > > > > this will give kernel-2.6.34-0.13.rc1.git1.fc14.x86_64, which has those > > changes included. > > I will apply this commits to 2.6.32, I afraid current OFED (which I need also) will not work on 2.6.33+. > You should be able to simply set CONFIG_RWSEM_GENERIC_SPINLOCK=n, CONFIG_RWSEM_XCHGADD_ALGORITHM=y by hand, as I mentioned earlier? -- 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