Re: Fix up power managment in 2.6

Pavel Machek
2003-09-03T22:14:58Z

Hi!

> > > #include "power.h"
> > >
> > > -extern long sys_sync(void);
> > > -
> > > -unsigned char software_suspend_enabled = 0;
> > > +unsigned char software_suspend_enabled = 1;
> > >
> > > #define __ADDRESS(x) ((unsigned long) phys_to_virt(x))
> > >
> > > ...by this you enable suspend even before system is booted. That's bad
> > > idea. It could hurt in the past (when we had sysrq-D so swsusp), and
> > > it may hurt again in future when battery goes low during boot.
> >
> > Does it or does it not cause a problem? Look at the old software_suspend()
> > function - The handling of this flag was weird and non-standard. This is
> > cleaner.
>
> I don't want to get in the middle of this, but having a laptop decide
> that it doesn't have enough battery to finish a boot is something which
> happens now and again. If this change could cause data corruption where
> the old code didn't, perhaps we could stand the overhead of moving the
> enable to the end of the boot, or wherever would be safe.

We do not yet do suspend-to-disk on battery low, so Patrick's code is
actually safe. Still I do not think that's good change.

Pavel
--
Horseback riding is like software...
...vgf orggre jura vgf serr.