Messages in this thread Patch in this message | | | Date | Mon, 20 Dec 2004 19:58:40 +1100 | From | Con Kolivas <> | Subject | Re: 2.6.10-rc3: kswapd eats CPU on start of memory-eating task |
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Con Kolivas wrote: > Logistically what makes sense is if a timeout of 0 is used as a test > that completely disables it (avoids another sysctl too). In time for > 2.6.10 we should disable it by default until the regressions are better > understood. Tuning it into a useful "on" position can happen later and I > suspect requires more code.
This patch should have the desired effect.
Con Index: linux-2.6.10-rc3/mm/rmap.c =================================================================== --- linux-2.6.10-rc3.orig/mm/rmap.c 2004-12-06 13:14:01.000000000 +1100 +++ linux-2.6.10-rc3/mm/rmap.c 2004-12-20 19:54:42.416058897 +1100 @@ -395,6 +395,9 @@ int page_referenced(struct page *page, i { int referenced = 0; + if (!swap_token_default_timeout) + ignore_token = 1; + if (page_test_and_clear_young(page)) referenced++; Index: linux-2.6.10-rc3/mm/thrash.c =================================================================== --- linux-2.6.10-rc3.orig/mm/thrash.c 2004-12-06 13:14:01.000000000 +1100 +++ linux-2.6.10-rc3/mm/thrash.c 2004-12-20 19:56:01.594602700 +1100 @@ -19,7 +19,10 @@ unsigned long swap_token_check; struct mm_struct * swap_token_mm = &init_mm; #define SWAP_TOKEN_CHECK_INTERVAL (HZ * 2) -#define SWAP_TOKEN_TIMEOUT (HZ * 300) +#define SWAP_TOKEN_TIMEOUT 0 +/* + * Currently disabled; Needs further code to work at HZ * 300. + */ unsigned long swap_token_default_timeout = SWAP_TOKEN_TIMEOUT; /*[unhandled content-type:application/pgp-signature] | |