Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754492Ab0L0QQn (ORCPT ); Mon, 27 Dec 2010 11:16:43 -0500 Received: from mail-qw0-f46.google.com ([209.85.216.46]:56555 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754247Ab0L0QQl (ORCPT ); Mon, 27 Dec 2010 11:16:41 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:cc:content-type; b=HCqxNZ6gvJtA73cL3qoBJ0t3Lq5fpcZPquX2E+uz7Hh+Tq5xTouxMHn4Gv79k5Ds5k Mah5mprWcIXvnfG/VU5GTHo5RtumMfVZ9VNLMms76NM4JoOZ3ErwY52kOnJajrWXOcZA sE8TOqQAulRZ8V4Eq1AfN7xq0fhBkxJtQh7YA= MIME-Version: 1.0 Reply-To: sedat.dilek@gmail.com In-Reply-To: <4D18B4A2.1030107@example.com> References: <20101227170451.a9a9f873.sfr@canb.auug.org.au> <4D18A480.2060309@example.com> <4D18A972.1020205@example.com> <4D18AD30.9070707@example.com> <4D18B4A2.1030107@example.com> Date: Mon, 27 Dec 2010 17:16:40 +0100 Message-ID: Subject: Re: linux-next: Tree for December 27 From: Sedat Dilek To: piotr@hosowicz.com Cc: Stephen Rothwell , linux-next@vger.kernel.org, LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1859 Lines: 59 2010/12/27 Piotr Hosowicz : > On 27.12.2010 16:13, Piotr Hosowicz wrote: >> >> On 27.12.2010 16:08, Sedat Dilek wrote: >>> >>> 2010/12/27 Piotr Hosowicz: >>>> >>>> On 27.12.2010 15:48, Sedat Dilek wrote: >>>>> >>>>> 2010/12/27 Piotr Hosowicz: >>>>>> >>>>>> On 27.12.2010 07:04, Stephen Rothwell wrote: >>>>>> >>>>>> Hello, >>>>>> >>>>>> I noticed that after first reboot with this kernel that my MP3 >>>>>> collection >>>>>> in >>>>>> mocp layed on Ext4 fs opens painfully slow. It is not my mistake, >>>>>> because >>>>>> I >>>>>> always do it the same way, new kernel, then music on. The problem >>>>>> is not >>>>>> present in rc7-git4. I could measure it in some way (timing ls -la >>>>>> in tht >>>>>> dir?) if somebody needs it. >>>>>> >>>>>> Regards, >>>>>> >>>>>> Piotr Hosowicz >>>>>> >>>>> >>>>> You tried mblk_io_submit mount-option for that partition? >>>> >>>> No, I do not use it, I do not even know what it is. My options are: >>>> >>>> /dev/sda2 on / type ext4 (rw,errors=remount-ro) >>>> >>> >>> Have a closer look at "ext4: Turn off multiple page-io submission by >>> default" >> >> I tried to Google for mblk_io_submit but I didn't find anything helpful. >> Could you tell me how should I add this option in fstab and what will be >> its effect? > > As far as I understand that option regards writing, not reading. The > symptoms I described occured while reading only. > That's the only performance issue I am aware of in ext4 in recent time. Why don't you try it and present some numbers in transfer ratio (write, read)? - Sedat - -- 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/