Re: Q on Fix-mapped linear address

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Hi...

On Mon, Apr 28, 2008 at 12:04 PM, sahlot arvind <asahlot@xxxxxxxxx> wrote:
> That means fix-mapped linear addresses are for managing memory in
> ZONE_HIGHMEM,

one of the purposes, yes...

>while just linear addresses are for managing in ZONE_NORMAL?

you can say so...

> In my pc the size of RAM is 256 MB - does that mean there is no ZONE_HIGHMEM
> available in my system and all the memory is mapped in ZONE_NORMAL and for
> dynamic (noncontiguous) allocation of pages ZONE_NORMAL is used?

yes, but IIRC ZONE_HIGHMEM related data structures might still exist
if you boot highmem enabled kernel on PC having <= 896 MB of RAM.

And yes, every allocation will be satisfied by looking up free pages
of ZONE_NORMAL.

regards,

Mulyadi.

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