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Bug#203639: ITP: cpudyn -- CPU dynamic frequency control

Celso González wrote:
> On Thu, Jul 31, 2003 at 10:59:10PM -0400, Joey Hess wrote:
> > Celso Gonzalez wrote:
> > >  cpudyn controls the speed in Intel SpeedStep, Pentium 4 Mobile,
> > >  and PowerPC machines with the cpufreq compiled in the kernel. It saves
> > >  battery, lowers temperature, and can put the computer disks in standby
> > >  mode if a given period has passed without any I/O operation. It works
> > >  well even with journaled file systems such as Ext3, XFS, or ReiserFS.
> > 
> > What mechanism is used for keeping the disks spun down? My laptop does
> > not need cpu frequency control (it's a crusoe), but I could use
> > something without noflushd's limitations.
> The code to spin down disks is taken from hdparm with few changes.
> If hdparm works for you cpudyn also will work.

Well that works fine until the filesystem spins the disk back up to
write a file. Oh well, not useful then.

see shy jo

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