Re: slow susped to disk

["Rafael J. Wysocki" <rjw@sisk.pl>]

Hi,

On Monday 03 April 2006 11:47, Pavel Machek wrote:
> > > I upgraded the kernel from 2.6.15 to 2.6.16 on my presario 2100. Both 
> > > kernels were compiled with the similar configuration files. Anyway I 
> > > found that suspend to disk (and resume) is much slower on 2.6.16 
> > > compared to 2.6.15. Any idea for why that might happen or how can I 
> > > speed it up? There is also a big difference when suspending with the 
> > > laptop plugged or not..
> > 
> > This is because the size of the suspend image is now greater than
> > for 2.6.15.
> > 
> > There's the /sys/power/image_size knob that controls the size of the image.
> > If you set it to 0 (eg. by echo 0 > /sys/power/image_size as root), the
> > 2.6.15 behavior should be restored.  However, if you set image_size > 0
> > it should improve the system responsiveness after resume.
> > 
> > Please refer to Documentation/power/interface.txt in the kernel tree for
> > details.
> 
> If you don't mind, I have added it to the FAQ.

ACK

Rafael