Messages in this thread | | | Date | Thu, 13 Jan 2000 23:28:02 +0100 (CET) | From | Rik van Riel <> | Subject | Re: [RFC] 2.3.39 zone balancing |
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On Thu, 13 Jan 2000, Kanoj Sarcar wrote:
[snip Linus' winning idea]
> Yes, that's what everyone seems to be pointing at. As I mentioned, I am > looking into this as I type. The only thing is, as Andrea points out, > 2.3 bh/irq handlers do not request HIGHMEM pages, so shouldn't the > 2.3 kswapd do something more like: > > more_work = 0; > for (i = 0; i < MAX_NR_ZONES; i++) { > if (i != ZONE_HIGHMEM) > more_work |= balance_zone(zone+i) > } > if (!more_work) > sleep()
Nope. We want to do page aging and reclamation in ZONE_HIGHMEM too, otherwise all memory `rotation' is going to happen in the other zones and the system can thrash in the remaining 1G of memory while there's 3G of unused data in ZONE_HIGHMEM...
But I agree, we probably don't have to reclaim that many pages in ZONE_HIGHMEM, something like freepages.min should be enough.
regards,
Rik -- The Internet is not a network of computers. It is a network of people. That is its real strength.
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