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Date: Tue, 31 May 2011 16:04:52 +0900 From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: caiqian@...hat.com CC: linux-mm@...ck.org, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, rientjes@...gle.com, hughd@...gle.com, kamezawa.hiroyu@...fujitsu.com, minchan.kim@...il.com, oleg@...hat.com Subject: Re: [PATCH v2 0/5] Fix oom killer doesn't work at all if system have > gigabytes memory (aka CAI founded issue) >> - If you run the same program as root, non root process and privilege >> explicit >> dropping processes (e.g. irqbalance) will be killed at first. > Hmm, at least there were some programs were root processes but were killed > first. > [ pid] ppid uid total_vm rss swap score_adj name > [ 5720] 5353 0 24421 257 0 0 sshd > [ 5353] 1 0 15998 189 0 0 sshd > [ 5451] 1 0 19648 235 0 0 master > [ 1626] 1 0 2287 129 0 0 dhclient Hi I can't reproduce this too. Are you sure these processes have a full root privilege? I've made new debugging patch. After applying following patch, do these processes show cap=1? index f0e34d4..fe788df 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -429,7 +429,7 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no struct task_struct *p; struct task_struct *task; - pr_info("[ pid] ppid uid total_vm rss swap score_adj name\n"); + pr_info("[ pid] ppid uid cap total_vm rss swap score_adj name\n"); for_each_process(p) { if (oom_unkillable_task(p, mem, nodemask)) continue; @@ -444,9 +444,9 @@ static void dump_tasks(const struct mem_cgroup *mem, const nodemask_t *no continue; } - pr_info("[%6d] %6d %5d %8lu %8lu %8lu %9d %s\n", + pr_info("[%6d] %6d %5d %3d %8lu %8lu %8lu %9d %s\n", task_tgid_nr(task), task_tgid_nr(task->real_parent), - task_uid(task), + task_uid(task), has_capability_noaudit(task, CAP_SYS_ADMIN), task->mm->total_vm, get_mm_rss(task->mm) + task->mm->nr_ptes, get_mm_counter(task->mm, MM_SWAPENTS), -- 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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