From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piotr Hosowicz Subject: Re: linux-next: Tree for December 27 Date: Tue, 28 Dec 2010 15:27:13 +0100 Message-ID: <4D19F3C1.8010208@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> Reply-To: piotr@hosowicz.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from 31.mail-out.ovh.net ([213.186.62.10]:41301 "HELO 31.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753242Ab0L1O11 (ORCPT ); Tue, 28 Dec 2010 09:27:27 -0500 In-Reply-To: Sender: linux-next-owner@vger.kernel.org List-ID: To: sedat.dilek@gmail.com Cc: Sedat Dilek , Stephen Rothwell , linux-next@vger.kernel.org, LKML On 27.12.2010 17:16, Sedat Dilek wrote: > 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 mistak= e, >>>>>>> because >>>>>>> I >>>>>>> always do it the same way, new kernel, then music on. The probl= em >>>>>>> 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 ar= e: >>>>> >>>>> /dev/sda2 on / type ext4 (rw,errors=3Dremount-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 hel= pful. >>> Could you tell me how should I add this option in fstab and what wi= ll 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 tim= e. > Why don't you try it and present some numbers in transfer ratio (writ= e, read)? Ok, I'll try to measure it in shell. Now I am building newest non-next=20 kernel and the trial script is: #!/bin/bash uname -a mount cd /data/music time ls -d * cd - This is basically what mocp does when it enters my music directory,=20 apart from displaying the results in ncurses based UI. Then I'll reboot= =20 with next kernel and run it again. Will it do? Regards, Piotr Hosowicz --=20 Kto=B6 zapuka=B3 do drzwi. -Bormann - pomy=B6la=B3 Stirlitz -Tak, to ja - pomy=B6la=B3 Bormann NP: Peter Green Splinter Group - Madison Blues NB: 2.6.37-rc7-20101227-pztidm+