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

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Message-ID: <20090429174323.GL8633@ZenIV.linux.org.uk>
Date:	Wed, 29 Apr 2009 18:43:23 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Valdis.Kletnieks@...edu
Cc:	Martin Knoblauch <knobi@...bisoft.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Galbraith <efault@....de>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	tigran aivazian <tigran@...azian.fsnet.co.uk>
Subject: Re: Analyzed/Solved: Booting 2.6.30-rc2-git7 very slow

On Wed, Apr 29, 2009 at 01:35:59PM -0400, Valdis.Kletnieks@...edu wrote:
> On Wed, 29 Apr 2009 10:24:20 PDT, Martin Knoblauch said:
> 
> >  One definitely comes from /etc/fstab, but I am not aware of any other script
>  mounting sysfs in my userspace.
> 
> You said it was a RedHat box?
> 
> Look in /etc/rc.sysinit:
> 
>         mount -n -t sysfs /sys /sys >/dev/null 2>&1
> 
> (Near line 28 for RHEL 4, line 23 for RHEL5, and line 21 for Fedora Rawhide)
> 
> Probably your culprit.

Again, the interesting question is WTF had mount(2) not failed with -EBUSY

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