From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764342AbYEHPAP (ORCPT ); Thu, 8 May 2008 11:00:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755795AbYEHO7Y (ORCPT ); Thu, 8 May 2008 10:59:24 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:47378 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763540AbYEHO7U (ORCPT ); Thu, 8 May 2008 10:59:20 -0400 Date: Thu, 8 May 2008 07:58:59 -0700 (PDT) From: Linus Torvalds To: "Zhang, Yanmin" cc: Matthew Wilcox , Ingo Molnar , "J. Bruce Fields" , LKML , Alexander Viro , Andrew Morton , linux-fsdevel@vger.kernel.org Subject: Re: AIM7 40% regression with 2.6.26-rc1 In-Reply-To: <1210221436.3453.98.camel@ymzhang> Message-ID: References: <1210052904.3453.30.camel@ymzhang> <20080506114449.GC32591@elte.hu> <20080506120934.GH19219@parisc-linux.org> <20080506162332.GI19219@parisc-linux.org> <1210217099.3453.92.camel@ymzhang> <1210221436.3453.98.camel@ymzhang> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 8 May 2008, Zhang, Yanmin wrote: > > I collected oprofile data. It looks not useful, as cpu idle is more than 50%. Ahh, so it's probably still the BKL that is the problem, it's just not in the file locking code. The changes to fs/locks.c probably didn't matter all that much, and the additional regression was likely just some perturbation. So it's probably fasync that AIM7 tests. Quite possibly coupled with /dev/tty etc. No file locking. Linus