Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423048AbWLUTZ5 (ORCPT ); Thu, 21 Dec 2006 14:25:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423054AbWLUTZ5 (ORCPT ); Thu, 21 Dec 2006 14:25:57 -0500 Received: from smtp.osdl.org ([65.172.181.25]:33793 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423048AbWLUTZ4 (ORCPT ); Thu, 21 Dec 2006 14:25:56 -0500 Date: Thu, 21 Dec 2006 11:25:40 -0800 From: Andrew Morton To: Jens Axboe Cc: linux-kernel@vger.kernel.org, Linus Torvalds Subject: performance regression from block merge Message-Id: <20061221112540.e4ba58bc.akpm@osdl.org> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 681 Lines: 14 Jens, elapsed time for `mke2fs /dev/hdc5' with the anticipatory scheduler (at least) has gone from nine seconds to sixty as a result of the recent block merge. This is the enty enth time that block code has been slammed into mainline without having had exposure to -mm testers or even to me personally, and it it the second time (at least) that obvious regressions have occurred as a result. I have a New Year's resolution for you ;) - 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/