The patch titled oom: avoid sending exiting tasks a SIGKILL has been added to the -mm tree. Its filename is oom-avoid-sending-exiting-tasks-a-sigkill.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: avoid sending exiting tasks a SIGKILL From: David Rientjes <rientjes@xxxxxxxxxx> It's unnecessary to SIGKILL a task that is already PF_EXITING and can actually cause a NULL pointer dereference of the sighand if it has already been detached. Instead, simply set TIF_MEMDIE so it has access to memory reserves and can quickly exit as the comment implies. Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx> Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/oom_kill.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN mm/oom_kill.c~oom-avoid-sending-exiting-tasks-a-sigkill mm/oom_kill.c --- a/mm/oom_kill.c~oom-avoid-sending-exiting-tasks-a-sigkill +++ a/mm/oom_kill.c @@ -458,7 +458,7 @@ static int oom_kill_process(struct task_ * its children or threads, just set TIF_MEMDIE so it can die quickly */ if (p->flags & PF_EXITING) { - __oom_kill_task(p, 0); + set_tsk_thread_flag(p, TIF_MEMDIE); return 0; } _ Patches currently in -mm which might be from rientjes@xxxxxxxxxx are avr32-invoke-oom-killer-from-page-fault.patch oom-check-pf_kthread-instead-of-mm-to-skip-kthreads.patch oom-introduce-find_lock_task_mm-to-fix-mm-false-positives.patch oom-dump_tasks-use-find_lock_task_mm-too.patch oom-pf_exiting-check-should-take-mm-into-account.patch oom-give-current-access-to-memory-reserves-if-it-has-been-killed.patch oom-avoid-sending-exiting-tasks-a-sigkill.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