From mboxrd@z Thu Jan 1 00:00:00 1970 From: Calvin Walton Subject: Re: Boot speed/mount time regression with 3.4.0-rc2 Date: Mon, 09 Apr 2012 17:20:46 -0400 Message-ID: <1334006446.2678.0.camel@ayu> References: <1333986823.2928.6.camel@ayu> <1333991404.2817.6.camel@ayu> <20120409205429.GB6958@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Cc: linux-btrfs@vger.kernel.org, Chris Mason To: Josef Bacik Return-path: In-Reply-To: <20120409205429.GB6958@localhost.localdomain> List-ID: On Mon, 2012-04-09 at 16:54 -0400, Josef Bacik wrote: > On Mon, Apr 09, 2012 at 01:10:04PM -0400, Calvin Walton wrote: > > On Mon, 2012-04-09 at 11:53 -0400, Calvin Walton wrote: > > > Hi, > > > > > > I have a system that's using a dracut-generated initramfs to mount a > > > btrfs root. After upgrading to kernel 3.4.0-rc2 to test it out, I've > > > noticed that the process of mounting the root filesystem takes much > > > longer with 3.4.0-rc2 than it did with 3.3.1 - nearly 30 seconds slower! > > And the bisect results are in: > > 285ff5af6ce358e73f53b55c9efadd4335f4c2ff is the first bad commit > > commit 285ff5af6ce358e73f53b55c9efadd4335f4c2ff > > Author: Josef Bacik > > Date: Fri Jan 13 15:27:45 2012 -0500 > > > > Btrfs: remove the ideal caching code> > > Ok can you give this a whirl? You are going to have to boot/reboot a few times > to let the cache get re-generated again to make sure it's taken effect, but > hopefully this will help out. Thanks, Unfortunately, it doesn't seem to help. Even after 3 or 4 reboots with this patch applied I'm still seeing the same delay. -- Calvin Walton