Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752772Ab2KVXDL (ORCPT ); Thu, 22 Nov 2012 18:03:11 -0500 Received: from mail-ob0-f174.google.com ([209.85.214.174]:61727 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752419Ab2KVS3P (ORCPT ); Thu, 22 Nov 2012 13:29:15 -0500 MIME-Version: 1.0 In-Reply-To: References: <20121120180949.GG1408@quack.suse.cz> Date: Thu, 22 Nov 2012 22:30:38 +0800 Message-ID: Subject: Re: Recent kernel "mount" slow From: Jeff Chua To: Jan Kara Cc: lkml , linux-fsdevel@vger.kernel.org, Linus Torvalds Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1126 Lines: 26 On Wed, Nov 21, 2012 at 11:46 PM, Jeff Chua wrote: > On Wed, Nov 21, 2012 at 2:09 AM, Jan Kara wrote: >> I haven't heard about such problem so far. What filesystem are you using? > > I've tried ext2/ext3/ext4/reiserfs/btrfs ... all seems to be slower > than before. Seems to be fs independent. > >> Can you quantify 'is slower'? Bisecting would be welcome of course. > > Haven't measure, but it seems to be 1 sec instead of .3 sec to mount. > I'll start bisecting:( > So, since I've 6 mounts on start up, now it takes 4 seconds longer to boot up. I started bisecting, and it seems to have multiple points of slowing down. The latest kernel is really slow mounting /dev/sda1 (fs independent) ... 0.529sec. Kernel 3.6.0 took 0.012sec, Kernel 3.7.0-rc2 took 0.168sec. Again, these are very early results. I'm verifying them again. Jeff -- 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/