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Message-Id: <20110415173824.79D354F4@kernel> Date: Fri, 15 Apr 2011 10:38:24 -0700 From: Dave Hansen <dave@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: linux-mm@...ck.org, Dave Hansen <dave@...ux.vnet.ibm.com> Subject: [RFC][PATCH 3/3] use pte pages in OOM score PTE pages eat up memory just like anything else, but we do not account for them in any way in the OOM scores. They are also _guaranteed_ to get freed up when a process is OOM killed, while RSS is not. Signed-off-by: Dave Hansen <dave@...ux.vnet.ibm.com> --- linux-2.6.git-dave/mm/oom_kill.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff -puN mm/oom_kill.c~use-pte-pages-in-oom-scire mm/oom_kill.c --- linux-2.6.git/mm/oom_kill.c~use-pte-pages-in-oom-scire 2011-04-15 10:37:13.184831585 -0700 +++ linux-2.6.git-dave/mm/oom_kill.c 2011-04-15 10:37:13.192831581 -0700 @@ -192,8 +192,10 @@ unsigned int oom_badness(struct task_str * The baseline for the badness score is the proportion of RAM that each * task's rss and swap space use. */ - points = (get_mm_rss(p->mm) + get_mm_counter(p->mm, MM_SWAPENTS)) * 1000 / - totalpages; + points = (get_mm_rss(p->mm) + + get_mm_counter(p->mm, MM_SWAPENTS) + + get_mm_counter(p->mm, MM_PTEPAGES)) + * 1000 / totalpages; task_unlock(p); /* _ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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