Messages in this thread | | | Subject | Re: [PATCH] mm/vmstat: add oom_kill counter | From | Konstantin Khlebnikov <> | Date | Fri, 19 May 2017 12:10:14 +0300 |
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On 19.05.2017 12:05, Vlastimil Babka wrote: > On 05/19/2017 08:59 AM, Konstantin Khlebnikov wrote: >> Show count of global oom killer invocations in /proc/vmstat > > Maybe some more rationale why is that useful?
Currently the only way to detect oom kill is grepping kernel logs. This counter makes such monitoring much easier.
> > Vlastimil > >> Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> >> --- >> include/linux/vm_event_item.h | 1 + >> mm/oom_kill.c | 1 + >> mm/vmstat.c | 1 + >> 3 files changed, 3 insertions(+) >> >> diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h >> index d84ae90ccd5c..1707e0a7d943 100644 >> --- a/include/linux/vm_event_item.h >> +++ b/include/linux/vm_event_item.h >> @@ -41,6 +41,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, >> KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY, >> PAGEOUTRUN, PGROTATED, >> DROP_PAGECACHE, DROP_SLAB, >> + OOM_KILL, >> #ifdef CONFIG_NUMA_BALANCING >> NUMA_PTE_UPDATES, >> NUMA_HUGE_PTE_UPDATES, >> diff --git a/mm/oom_kill.c b/mm/oom_kill.c >> index 04c9143a8625..c734c42826cf 100644 >> --- a/mm/oom_kill.c >> +++ b/mm/oom_kill.c >> @@ -883,6 +883,7 @@ static void oom_kill_process(struct oom_control *oc, const char *message) >> */ >> do_send_sig_info(SIGKILL, SEND_SIG_FORCED, victim, true); >> mark_oom_victim(victim); >> + count_vm_event(OOM_KILL); >> pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n", >> task_pid_nr(victim), victim->comm, K(victim->mm->total_vm), >> K(get_mm_counter(victim->mm, MM_ANONPAGES)), >> diff --git a/mm/vmstat.c b/mm/vmstat.c >> index 76f73670200a..fe80b81a86e0 100644 >> --- a/mm/vmstat.c >> +++ b/mm/vmstat.c >> @@ -1018,6 +1018,7 @@ const char * const vmstat_text[] = { >> >> "drop_pagecache", >> "drop_slab", >> + "oom_kill", >> >> #ifdef CONFIG_NUMA_BALANCING >> "numa_pte_updates", >> >> -- >> To unsubscribe, send a message with 'unsubscribe linux-mm' in >> the body to majordomo@kvack.org. For more info on Linux MM, >> see: http://www.linux-mm.org/ . >> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a> >> >
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