Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754662AbaGCTF3 (ORCPT ); Thu, 3 Jul 2014 15:05:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:63571 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751336AbaGCTF1 (ORCPT ); Thu, 3 Jul 2014 15:05:27 -0400 Date: Thu, 3 Jul 2014 15:05:06 -0400 From: Dave Jones To: Linus Torvalds Cc: Raghavendra K T , Andrew Morton , Fengguang Wu , David Cohen , Al Viro , Damien Ramonda , Jan Kara , David Rientjes , Nishanth Aravamudan , linux-mm , Linux Kernel Mailing List Subject: Re: [PATCH] mm readahead: Fix sys_readahead breakage by reverting 2MB limit (bug 79111) Message-ID: <20140703190506.GA24683@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Raghavendra K T , Andrew Morton , Fengguang Wu , David Cohen , Al Viro , Damien Ramonda , Jan Kara , David Rientjes , Nishanth Aravamudan , linux-mm , Linux Kernel Mailing List References: <1404392547-11648-1-git-send-email-raghavendra.kt@linux.vnet.ibm.com> <53B59CB5.9060004@linux.vnet.ibm.com> <53B5A343.4090402@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 03, 2014 at 11:53:57AM -0700, Linus Torvalds wrote: > On Thu, Jul 3, 2014 at 11:38 AM, Raghavendra K T > wrote: > > > > Okay, how about something like 256MB? I would be happy to send a patch > > for that change. > > I'd like to see some performance numbers. I know at least Fedora uses > "readahead()" in the startup scripts, do we have any performance > numbers for that? this got rolled up into systemd a while ago, so it's not just Fedora. re: numbers, systemd-analyze and systemd-bootchart look like the way to figure that out.. https://wiki.archlinux.org/index.php/Improve_boot_performance Dave -- 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/