[U-Boot] [RFC] dm: tegra: boot time regression

[Simon Glass]

Hi,

On 21 October 2014 17:19, Simon Glass <sjg at chromium.org> wrote:
> Hi Marcel,
>
> On 21 October 2014 08:37, Marcel Ziswiler <marcel at ziswiler.com> wrote:
>> Migrating our BSPs towards mainline U-Boot I noticed it suddenly booting
>> slower. With mainline Linux I noticed about a 1 to 2 second increase
>> while booting downstream L4T takes 10 to 15 seconds longer! Git
>> bisecting it revealed the following commit to be at odds:
>>
>> 858530a8c0a7ce7e573e513934804a00d6676813
>> dm: tegra: Enable driver model for serial
>>
>> Switching back to not using the DM driver for serial brings it back to
>> booting much faster. However looking closely at the serial stuff and its
>> accompanying settings I could not quite pinpoint why exactly any of this
>> would make the Linux kernel suddenly boot slower.
>>
>> Has anybody noticed similar issues?
>>
>
> No I haven't but I have not really tested it. I wonder how U-Boot is
> affecting Linux boot time? Do you have a trace of the kernel boot?

Did this get resolved? Do you have an update please?

Regards,
Simon