Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758241Ab2EATDu (ORCPT ); Tue, 1 May 2012 15:03:50 -0400 Received: from mx2.fusionio.com ([66.114.96.31]:59613 "EHLO mx2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751846Ab2EATDt (ORCPT ); Tue, 1 May 2012 15:03:49 -0400 X-ASG-Debug-ID: 1335899028-0421b5151418b50001-xx1T2L X-Barracuda-Envelope-From: JAxboe@fusionio.com Message-ID: <4FA03391.9010308@fusionio.com> Date: Tue, 1 May 2012 21:03:45 +0200 From: Jens Axboe MIME-Version: 1.0 To: Jeff Moyer CC: Tejun Heo , Dave Jones , "linux-kernel@vger.kernel.org" , Sasha Levin Subject: Re: [PATCH v3.4-rc5] block: iocontext->nr_tasks should be initialized to one References: <1335873936.16988.148.camel@lappy> <20120501161729.GV26595@google.com> <4FA0253F.4000302@fusionio.com> <20120501180906.GX26595@google.com> <4FA028EE.7020208@fusionio.com> <4FA02D71.3060001@fusionio.com> X-ASG-Orig-Subj: Re: [PATCH v3.4-rc5] block: iocontext->nr_tasks should be initialized to one In-Reply-To: X-Enigmail-Version: 1.4.1 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mail1.int.fusionio.com[10.101.1.21] X-Barracuda-Start-Time: 1335899028 X-Barracuda-Encrypted: AES128-SHA X-Barracuda-URL: http://10.101.1.181:8000/cgi-mod/mark.cgi X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.95712 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 954 Lines: 25 On 2012-05-01 20:50, Jeff Moyer wrote: > Jens Axboe writes: > >> On 2012-05-01 20:31, Jeff Moyer wrote: >>> Jens Axboe writes: >>> I know of one project: the venerable dump/restore utility uses CLONE_IO. >> >> Thanks Jeff, now I remember the specifics of what we tested. IIRC, we >> also did numbers back then comparing the coop merging vs specifically >> using CLONE_IO. > > Maybe? I picked through some old emails but couldn't find that exact > comparison. It would have been a smart thing to do, though! It might have been in a bugzilla thing, unfortunately. But yes, it'd be the smart thing to do, hence I was pretty sure that you did it! -- Jens Axboe -- 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/