linux-kernel - Re: state of the fastboot activities?

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Message-ID: <20090813153326.GR13320@pengutronix.de>
Date:	Thu, 13 Aug 2009 17:33:26 +0200
From:	Robert Schwebel <r.schwebel@...gutronix.de>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: state of the fastboot activities?

On Thu, Aug 13, 2009 at 08:28:26AM -0700, Arjan van de Ven wrote:
> > That's bad :-) So there is no room for improvement any more in our
> > ARM boot sequences ...
>
> on x86 we're doing pretty well ;-)

On i.MX27 (400 MHz ARM926EJ-S) we currently need 7 s, measured from
power-on through the kernel up to "starting init". This is with

- no delay in u-boot-v2
- rootfs on NAND (UBIFS)
- quiet
- precalculated loops-per-jiffy
- zImage kernel instead of uImage

rsc
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