linux-kernel - Re: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow

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Message-ID: <971371.70253.qm@web32604.mail.mud.yahoo.com>
Date:	Wed, 17 Jun 2009 01:35:38 -0700 (PDT)
From:	Martin Knoblauch <knobi@...bisoft.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Andrew Morton <akpm@...ux-foundation.org>, efault@....de,
	viro@...iv.linux.org.uk, rjw@...k.pl, linux-kernel@...r.kernel.org,
	shemminger@...tta.com, matthew@....cx, mike.miller@...com,
	James Owens <JOwens@...com>
Subject: Re: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow


----- Original Message ----

> From: Jesse Barnes <jbarnes@...tuousgeek.org>
> To: Martin Knoblauch <knobi@...bisoft.de>
> Cc: Kay Sievers <kay.sievers@...y.org>; Andrew Morton <akpm@...ux-foundation.org>; efault@....de; viro@...iv.linux.org.uk; rjw@...k.pl; linux-kernel@...r.kernel.org; shemminger@...tta.com; matthew@....cx; mike.miller@...com
> Sent: Tuesday, June 16, 2009 9:25:47 PM
> Subject: Re: Analyzed/Solved/Bisected: Booting 2.6.30-rc2-git7 very slow
> 
> On Thu, 28 May 2009 02:14:46 -0700 (PDT)
> Martin Knoblauch wrote:
> > > I expect the duplicate comes from a left-over mount in initramfs
> > > which isn't a duplicate in the sense of a bug in vfs or mount or
> > > anything. I guess, it is just still mounted in the initial kernel
> > > rootfs, below the root from the disk. It could be that a umount
> > > from initramfs did go wrong because of a changed timing.
> > > 
> > 
> >  This is what I suspect as well. I know for sure that the first
> > sysfs-line in /proc/mounts
> > 
> > | none /sys sysfs rw 0 0
> > 
> > is already there (2.6.29-rc1 and up) when entering startup-skripts.
> > It is supposed to be unmounted before, but something seems to prevent
> > it. I have idea how to capture debug output from the initrd/init
> > script :-(
> 
> What's the latest here Martin?  It sounded like this was a userspace
> issue, with something reading the VPD over and over?  Or was it just a
> longer timeout that caused a specific driver to slow everything down?
> 

 Not sure about the VPD thing. Anyway, no real news. Still happens in 2.6.30. But it only happens on a certain HW platform (HP/DL380G4). The folks at HP try to reproduce in their environment.

Cheers
Martin

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