On Tue, 22 Nov 2005, Andi Kleen wrote:

quoted

All of that said, I am not even sure we have a bit left in the page
flags on smaller architectures :/.

How about

#define PG_checked               8      /* kill me in 2.5.<early>. */

?

At least PG_uncached isn't used on many architectures too, so could
be reused. I don't know why those that use it don't check VMAs instead.

PG_unchecked appears to be totally unused. It's only users are the macros
that manipulate the bit and mm/page_alloc.c . It appears it has been a
long time since it was used to it is a canditate for reuse.

-- 
Mel Gorman
Part-time Phd Student                          Java Applications Developer
University of Limerick                         IBM Dublin Software Lab

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