Messages in this thread | | | Date | Tue, 22 Nov 2005 19:40:04 +0000 (GMT) | From | Mel Gorman <> | Subject | Re: [PATCH 2/5] Light Fragmentation Avoidance V20: 002_usemap |
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On Tue, 22 Nov 2005, KAMEZAWA Hiroyuki wrote:
> 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 :) >
Version has now been posted that has no usemap with the subject "Light fragmentation avoidance without usemap". Details on implementation and benchmarks are included.
-- Mel Gorman Part-time Phd Student Java Applications Developer University of Limerick IBM Dublin Software Lab - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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