On Sat, May 24 2003, Brad Chapman wrote:
> Mr. Axboe,
> 
> What exactly does your laptop-mode patch for 2.4.21-rc2 do? I've
> read through parts of it and it appears to add logic to the VM
> which causes it to do things at a certain time, as specified by
> userspace. Unfortunately I can't puzzle much else out of it, and
> I can't run it yet.

Several people have asked, here's a first draft of a little text file
explaining how it works. I'm also attaching the script mentioned in that
file.

> You;ve also said that it adds a "non-significant" amount of battery
> time. How much battery time do you mean (10%, 15%, 15min, etc...)

See the doc, it greatly depends on your laptop/drive/workload. If you
are able to keep the disk down for many minutes at the time, it's not
unrealistic to get 10% extra.

-- 
Jens Axboe