[linux-mm-cc] Re: a doubt

[Rik van Riel]

On Wed, 28 Jun 2006, Nitin Gupta wrote:

> I'm not sure but isn't de/compression very power hungry? If OLPC is so
> concerned about power  (saw a project that disables cursor blinking to
> save power!) then how is ccaching helpful to them? Just to run an app
> or two extra even if it eats up battery?

Compression is not done constantly, but only on pages which
the VM has determined to be infrequently used.

Also, compression and decompression might well take less
power than powering up the flash device and reading page
cache data from that...

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