Messages in this thread | | | Date | Thu, 3 Nov 2005 23:26:49 -0800 | From | Paul Jackson <> | Subject | Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19 |
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Ingo wrote: > to clearly stress the 'might easily fail' restriction. But if userspace > is well-behaved on Andy's systems (which it seems to be), then in > practice it should be resizable.
At first glance, this is the sticky point that jumps out at me.
Andy wrote: > My experience is that after some days or weeks of running have gone > by, there is no possible way short of a reboot to get pages merged > effectively back to any pristine state with the infrastructure that > exists there.
I take it, from what Andy writes, and from my other experience with similar customers, that his workload is not "well-behaved" in the sense you hoped for.
After several diverse jobs are run, we cannot, so far as I know, merge small pages back to big pages.
I have not played with Mel Gorman's Fragmentation Avoidance patches, so don't know if they would provide a substantial improvement here. They well might.
-- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson <pj@sgi.com> 1.925.600.0401 - 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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