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Re: Laptop Mode

On Mon, Sep 13, 2004 at 08:16:09AM +0200, Jens Axboe wrote:
> On Sun, Sep 12 2004, Bryan Forbes wrote:
> > 1. What's the difference between that and noflushd?
> noflushd is dumb, 

Heh, don't call the baby dumb. It's had a difficult childhood; evil
parents that didn't care. No, really, a bit retarded maybe...

> it just tries to postpone writes. laptop mode is more
> involved, the vm knows when the computer is in laptop mode.
> additionally, laptop mode can do things like automatic flushing of dirty
> data when you spin your drive up for other activity.

The latter being included in noflushd as well. It comes with a few more
fancy feature like different policies per disk, optionally preventing
spindown when machine is used interactively, etc. Oh, and it works with
kernels that predate the laptop-mode patch. The ordinary laptop user
won't care, and is usually better off with laptop-mode these days.



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