Re: [GIT PULL] PM updates for 2.6.33

Rafael J. Wysocki
2009-12-06T01:25:28Z

On Sunday 06 December 2009, Arjan van de Ven wrote:
> On Sun, 6 Dec 2009 00:55:36 +0100
> "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
>
> >
> > Disk spinup/spindown takes time, but also some ACPI devices resume
> > slowly, serio devices do that too and there are surprisingly many
> > drivers that wait (using msleep() during suspend and resume). Apart
> > from this, every PCI device going from D0 to D3 during suspend and
> > from D3 to D0 during resume requires us to sleep for 10 ms (the
> > sleeping is done by the PCI core, so the drivers don't even realize
> > its there).
>
> maybe a good step is to make a scripts/bootgraph.pl equivalent for
> suspend/resume (or make a debug mode that outputs in a compatible format
> so that the script can be used as is.. I don't mind either way, and
> consider this my offer to help with such a script as long as there's
> sufficient logging in dmesg ;-)

OK, so what kind of logging is needed?

> that way we can SEE which ones are an issue.... and by how much.

Well, why not.

Thanks,
Rafael