Messages in this thread | | | Date | Tue, 22 Nov 2005 19:48:05 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH 2/5] Light Fragmentation Avoidance V20: 002_usemap |
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Mel Gorman wrote: > On Tue, 22 Nov 2005, Andi Kleen wrote: > > >>>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. > Considering memory hotplug, I don't want to resize bitmaps at hot-add/remove. no bitmap is welcome :)
-- Kame
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