Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758317AbXERVLw (ORCPT ); Fri, 18 May 2007 17:11:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754457AbXERVLq (ORCPT ); Fri, 18 May 2007 17:11:46 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:51811 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752652AbXERVLp (ORCPT ); Fri, 18 May 2007 17:11:45 -0400 Message-ID: <464E168E.4000403@garzik.org> Date: Fri, 18 May 2007 17:11:42 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: Andrew Morton CC: Alex Volkov , "'Linux Kernel Mailing List'" Subject: Re: aio is unlikely References: <20070509151831.f5956b66.akpm@linux-foundation.org> <058f01c7998e$1406e370$650df7cd@MUMBA> <20070518140624.1a4db517.akpm@linux-foundation.org> In-Reply-To: <20070518140624.1a4db517.akpm@linux-foundation.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.3 (----) X-Spam-Report: SpamAssassin version 3.1.8 on srv5.dvmed.net summary: Content analysis details: (-4.3 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 727 Lines: 22 Andrew Morton wrote: > Yes, if you agree with Jeff's original point. > > But I don't, actually. Sure, on some machines+workloads, AIO is more > common than sync IO. But I expect that when we sum across all the > machines+workloads in the world, sync IO is more common and is hence the > case we should optimise for. > > That's assuming that the unlikely() actually does something. For the record, I agreed with your counter-point, and retract[ed?] my disagreement... Jeff - 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/