The patch titled oom: use pte pages in OOM score has been added to the -mm tree. Its filename is oom-use-pte-pages-in-oom-score.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: oom: use pte pages in OOM score From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> 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. Reported-by: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx> Cc: <stable@xxxxxxxxxx> [2.6.36+] Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/oom_kill.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff -puN mm/oom_kill.c~oom-use-pte-pages-in-oom-score mm/oom_kill.c --- a/mm/oom_kill.c~oom-use-pte-pages-in-oom-score +++ a/mm/oom_kill.c @@ -172,10 +172,13 @@ 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. + * task's rss, pagetable 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) + p->mm->nr_ptes; + points += get_mm_counter(p->mm, MM_SWAPENTS); + + points *= 1000; + points /= totalpages; task_unlock(p); /* _ Patches currently in -mm which might be from kosaki.motohiro@xxxxxxxxxxxxxx are oom-use-pte-pages-in-oom-score.patch mm-per-node-vmstat-show-proper-vmstats.patch mm-per-node-vmstat-show-proper-vmstats-fix.patch mm-increase-reclaim_distance-to-30.patch mm-introduce-wait_on_page_locked_killable.patch x86mm-make-pagefault-killable.patch mm-mem-hotplug-fix-section-mismatch-setup_per_zone_inactive_ratio-should-be-__meminit.patch mm-mem-hotplug-recalculate-lowmem_reserve-when-memory-hotplug-occur.patch mm-mem-hotplug-update-pcp-stat_threshold-when-memory-hotplug-occur.patch mm-mem-hotplug-update-pcp-stat_threshold-when-memory-hotplug-occur-fix.patch mm-convert-vma-vm_flags-to-64-bit.patch mm-add-__nocast-attribute-to-vm_flags.patch fremap-convert-vm_flags-to-unsigned-long-long.patch procfs-convert-vm_flags-to-unsigned-long-long.patch oom-replace-pf_oom_origin-with-toggling-oom_score_adj.patch oom-replace-pf_oom_origin-with-toggling-oom_score_adj-update.patch mm-mmu_gather-rework.patch powerpc-mmu_gather-rework.patch sparc-mmu_gather-rework.patch s390-mmu_gather-rework.patch arm-mmu_gather-rework.patch sh-mmu_gather-rework.patch ia64-mmu_gather-rework.patch um-mmu_gather-rework.patch mm-now-that-all-old-mmu_gather-code-is-gone-remove-the-storage.patch mm-powerpc-move-the-rcu-page-table-freeing-into-generic-code.patch mm-extended-batches-for-generic-mmu_gather.patch lockdep-mutex-provide-mutex_lock_nest_lock.patch mm-remove-i_mmap_lock-lockbreak.patch mm-convert-i_mmap_lock-to-a-mutex.patch mm-revert-page_lock_anon_vma-lock-annotation.patch mm-improve-page_lock_anon_vma-comment.patch mm-use-refcounts-for-page_lock_anon_vma.patch mm-convert-anon_vma-lock-to-a-mutex.patch mm-optimize-page_lock_anon_vma-fast-path.patch mn10300-replace-mm-cpu_vm_mask-with-mm_cpumask.patch tile-replace-mm-cpu_vm_mask-with-mm_cpumask.patch mm-convert-mm-cpu_vm_cpumask-into-cpumask_var_t.patch mm-convert-mm-cpu_vm_cpumask-into-cpumask_var_t-checkpatch-fixes.patch mm-batch-activate_page-to-reduce-lock-contention.patch sparse-define-dummy-build_bug_on-definition-for-sparse.patch sparse-define-__must_be_array-for-__checker__.patch sparse-undef-__compiletime_warningerror-if-__checker__-is-defined.patch mm-move-enum-vm_event_item-into-a-standalone-header-file.patch memcg-count-the-soft_limit-reclaim-in-global-background-reclaim.patch memcg-add-stats-to-monitor-soft_limit-reclaim.patch add-the-pagefault-count-into-memcg-stats.patch add-the-pagefault-count-into-memcg-stats-fix.patch cpusets-randomize-node-rotor-used-in-cpuset_mem_spread_node.patch cpusets-randomize-node-rotor-used-in-cpuset_mem_spread_node-cpusets-initialize-spread-rotor-lazily.patch kexec-remove-kmsg_dump_kexec.patch kexec-remove-kmsg_dump_kexec-fix.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html