AW: CONFIG_BIGMEM and rawio

Wichert, Gerhard (Gerhard.Wichert@pdb.siemens.de)
Thu, 2 Sep 1999 12:41:19 +0200


> -----Ursprüngliche Nachricht-----
> Von: Andrea Arcangeli [mailto:andrea@suse.de]
> Gesendet am: Donnerstag, 2. September 1999 12:26
> An: Manfred
> Cc: Linux Kernel; Wichert, Gerhard; Linus Torvalds
> Betreff: Re: CONFIG_BIGMEM and rawio
>
> On Thu, 2 Sep 1999, Manfred wrote:
>
>
> >Btw, why do you use the full buddy algorithm with 10 lists
> for bigmem?
>
> Yes.
>
> >currently, only single pages are allocated, so 1 or 2 lists should be
> >sufficient.
>
> I think it would be a bad idea on the long run to use only 1
> or 2 lists.
> Right now one list would be ok, but it would be really dirty.
> Maybe in the
> future we may want to use bigmem memory for other things and
> I don't want
> to break the GFP_BIGMEM just to save some CPU cycle.
Besides you would need more code changes and would get really huge lists.

>
> Andrea
>
Gerhard

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