state of the fastboot activities?

state of the fastboot activities?

[Robert Schwebel]

Hi Arjan,

Can you elaborate on the current state of the fastboot activities? This
tree here:

http://git.kernel.org/?p=linux/kernel/git/arjan/linux-2.6-async-for-30.git;a=summary

came to a stop in march, and the mainline contains the asyncronous init
stuff, but no "fastboot" parameter as described on LWN:

http://lwn.net/Articles/314808/

Thanks,
rsc
-- 
Pengutronix e.K.                           |                             |
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Re: state of the fastboot activities?

[Arjan van de Ven]

Robert Schwebel wrote:
> Hi Arjan,
> 
> Can you elaborate on the current state of the fastboot activities? This
> tree here:
> 
> http://git.kernel.org/?p=linux/kernel/git/arjan/linux-2.6-async-for-30.git;a=summary
> 
> came to a stop in march, and the mainline contains the asyncronous init
> stuff, but no "fastboot" parameter as described on LWN:
> 
> http://lwn.net/Articles/314808/
> 

there is no more option; the behavior is there by default.... so it's all integrated and done..

Re: state of the fastboot activities?

[Robert Schwebel]

On Thu, Aug 13, 2009 at 06:46:50AM -0700, Arjan van de Ven wrote:
> there is no more option; the behavior is there by default.... so it's
> all integrated and done..

That's bad :-) So there is no room for improvement any more in our ARM
boot sequences ...

Thanks,
rsc
-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

Re: state of the fastboot activities?

[Arjan van de Ven]

Robert Schwebel wrote:
> On Thu, Aug 13, 2009 at 06:46:50AM -0700, Arjan van de Ven wrote:
>> there is no more option; the behavior is there by default.... so it's
>> all integrated and done..
> 
> That's bad :-) So there is no room for improvement any more in our ARM
> boot sequences ...
> 
> Thanks,
> rsc

on x86 we're doing pretty well ;-)

Re: state of the fastboot activities?

[Robert Schwebel]

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
-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |