linux-kernel - Re: [Bug #13178] Booting very slow

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Message-ID: <ac3eb2510905190158o6682f7aat62ff66ac9aaa2a74@mail.gmail.com>
Date:	Tue, 19 May 2009 10:58:24 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Martin Knoblauch <spamtrap@...bisoft.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [Bug #13178] Booting very slow

On Tue, May 19, 2009 at 09:22, Martin Knoblauch <spamtrap@...bisoft.de> wrote:
>> >  The issue is still open. It turns out that starting with 2.6.29-rc1
>> /proc/mounts already has a "sysfs" line when entering the startup scripts from
>> initrd. This breaks the RHEL4 firmware hotplug script.
>>
>> Is that possibly a missing/failing "umount /sys" _in_ initramfs, which
>> leaves the sysfs entry in /proc/mounts behind, which then shows up as
>> a duplicate when running in the real rootfs?
>
>  could be. Remains the question, why it never showed up before 2.6.29. I compared my initrd images for 2.6.28 and 2.6.29-rc1, and they only differ in the module-binaries.

I wouldn't be surprised if we are just "too fast" again now with the
async stuff, for another piece of rather fragile userspace bootup
logic, making some wrong assumptions. Are you compiling-in the modules
for the root disk and the root filesystem?

Cheers,
Kay
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