Re: [RFC][PATCH] PM / Hibernate: Add sysfs knob to control size ofmemory for drivers

From: Pavel Machek
Date: Wed May 18 2011 - 14:36:46 EST


> > > OK, there are no comments, so my understanding is that everyone is
> > > fine with this patch and I can add it to my linux-next branch.
> >
> > Actually no, I don't like it. Yes, knob might be useful for debugging,
> > but having it as part of official kernel interface...
> Well I and people with similar setups it is actually quite useful. It
> makes the difference between does hibernate *every time* versus does not
> hibernate sometimes. And I don't see why it can't go again, when the issue
> is taken care of elsewise in the future. I think that autotuning / drivers
> allocating their memory via whatnot is better, but until such a mechanism
> is agreed, developed and included in official kernel I do think that this
> knob does help.

Yes, autotuning would be better, and yes, knob is useful for you now.

I'd say the knob is for debugging and should go to debugfs somewhere.

> I think missing is some documentation so that the advanced user can figure
> out this knob. we can easily delete the knob when it is no longer neccessary.
(cesky, pictures)
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