Re: [TuxOnIce-devel] [RFC] TuxOnIce

[Rafael J. Wysocki]

On Tuesday 26 May 2009, Oliver Neukum wrote:
> Am Montag, 25. Mai 2009 23:43:23 schrieb Rafael J. Wysocki:
> > > Oh, before I forget to mention and you ask - how to know what allowance
> > > for the drivers? I use a sysfs entry - the user then just needs to see
> > > what's needed on their first attempt, set up a means of putting that
> > > value in the sysfs file in future (eg /etc/hibernate/tuxonice.conf) and
> > > then forget about it.
> >
> > OK, this is reasonable.
> 
> No, I am afraid it is not. The average user has no clue. Even if that
> is not the problem, the user never knows for sure he has encountered
> the worst case.

OK there, but surely it's better to have a sysfs attribute than a fixed value?

> If you really have drivers that have exceptionally large memory requirements
> (eg. you need to copy video ram), you should tell the system through struct
> driver and do accounting at probe and removal of devices.

Or perhaps the drivers should allocate memory from a PM notifier (which is
called before the freezing of tasks) to avoid the problem?

Rafael
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