Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757312AbZGGGGb (ORCPT ); Tue, 7 Jul 2009 02:06:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751960AbZGGGGY (ORCPT ); Tue, 7 Jul 2009 02:06:24 -0400 Received: from mga09.intel.com ([134.134.136.24]:22958 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751930AbZGGGGX (ORCPT ); Tue, 7 Jul 2009 02:06:23 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.42,361,1243839600"; d="scan'208";a="530678724" Subject: Re: [Bug #13726] fio sync read 4k block size 35% regression From: "Zhang, Yanmin" To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Kernel Testers List , Wu Fengguang In-Reply-To: References: <35kKlbXMqWN.A.RXD.D0oUKB@chimera> Content-Type: text/plain; charset=UTF-8 Date: Tue, 07 Jul 2009 14:06:42 +0800 Message-Id: <1246946802.2560.532.camel@ymzhang> Mime-Version: 1.0 X-Mailer: Evolution 2.22.1 (2.22.1-2.fc9) Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1474 Lines: 36 On Tue, 2009-07-07 at 02:01 +0200, Rafael J. Wysocki wrote: > This message has been generated automatically as a part of a report > of recent regressions. > > The following bug entry is on the current list of known regressions > from 2.6.30. Please verify if it still should be listed and let me know > (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13726 > Subject : fio sync read 4k block size 35% regression > Submitter : Zhang, Yanmin > Date : 2009-07-01 11:25 (6 days old) > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=51daa88ebd8e0d437289f589af29d4b39379ea76 > References : http://lkml.org/lkml/2009/6/30/679 > Handled-By : Wu Fengguang Fengguang, I'm still working on it now. The new testing against 2.6.31-rc2 is ongoing. fio sync/mmap read has new behavior. I did collect some data. But suddenly with new created data, the fio_sync_read_4k regression disappeared, while fio_mmap_read is still there. Originally, the testing and bisect were stable. Let me check what happens firstly. Just update.  How did you test your new readahead patches before sending to LKML? Yanmin -- 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/