Re: [PATCH] reduce struct_page size

[Rik van Riel <riel@conectiva.com.br>]

On Mon, 18 Feb 2002, Linus Torvalds wrote:
> On Mon, 18 Feb 2002, Rik van Riel wrote:
> >
> > o page->zone is shrunk from a pointer to an index into a small
> >   array of zones ... this means we have space for 3 more chars
> >   in the struct page to other stuff (say, page->age)
>
> Why not put "page->zone" into the page flags instead?

The original reason it's not in page->flags is that the
rmap patch also has page->age.

Furthermore, the NUMA folks wanted the ability to have
quite a few zones.

> The patch looks good, it's just silly to say that you made "struct page"
> smaller, and then waste four bytes.

If you want I'll look into shoving the zone bits into
page->flags ...

regards,

Rik
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