linux-kernel - Re: How to debug kernel startup time?

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Message-ID: <20090329095917.20948680@infradead.org>
Date:	Sun, 29 Mar 2009 09:59:17 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Corrado Zoccolo <czoccolo@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to debug kernel startup time?

On Sun, 29 Mar 2009 18:45:36 +0200
Corrado Zoccolo <czoccolo@...il.com> wrote:

> On Sun, Mar 29, 2009 at 5:51 PM, Arjan van de Ven
> <arjan@...radead.org> wrote:
> > On Sun, 29 Mar 2009 17:40:10 +0200
> > Corrado Zoccolo <czoccolo@...il.com> wrote:
> >
> >> Hi,
> >> I'm seeing around 2 s "lost" during kernel boot, that are not
> >> accounted for any init call (excerpt of dmesg with initcall_debug
> >> follows, kernel is 2.6.29).
> >> What's the suggested way to investigate such problems?
> >
> > I take it you don't have an initrd ?
> 
> You guessed right.
> 
> >
> > If so I know what you are hitting; I have a patch to solve it but
> > it's a bit convoluted and not ready for mainline.... let me know if
> > you want to try it, I suspect it'll solve your issue ;)
> >
> 
> Sure. I'd like to test it.
> 

attached...

-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org

View attachment "linux-2.6.29-dont-wait-for-mouse.patch" of type "text/x-patch" (1359 bytes)

View attachment "linux-2.6.29-retry-root-mount.patch" of type "text/x-patch" (1924 bytes)