Messages in this thread Patch in this message | | | Date | Thu, 13 Jan 2000 21:13:41 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: [RFC] 2.3.39 zone balancing |
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On Thu, 13 Jan 2000, Rik van Riel wrote:
>Now we'll only want to build something into kswapd >so that rebalancing the high memory zones is done in >the background.
You never need to rebance the bigmem between 1g and 64g withing kswapd. This because bh/irq handlers are not going to use it. So kswapd has to care only about the memory below the bigmem boundary.
BTW I just noticed currently (2.3.40pre1) kswapd is completly screwedup. kswapd should still do:
while (nr_free_pages - nr_free_bigpages < freepages.high)
exactly like in our early 2.3.18 bigmem code because _nothing_ is changed is the basic MM design since that time.
The fix against 2.3.40pre1 to re-activate kswapd is this:
--- 2.3.40pre1/mm/vmscan.c Sun Jan 9 20:45:31 2000 +++ /tmp/vmscan.c Thu Jan 13 21:09:33 2000 @@ -503,7 +503,7 @@ do { /* kswapd is critical to provide GFP_ATOMIC allocations (not GFP_HIGHMEM ones). */ - if (nr_free_buffer_pages() >= freepages.high) + if (nr_free_pages() - nr_free_highpages() >= freepages.high) break; if (!do_try_to_free_pages(GFP_KSWAPD, 0)) break;
Andrea
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