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Re: [PATCH] oom: Make coredump interruptible

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From: Oleg Nesterov
Subject: Re: [PATCH] oom: Make coredump interruptible
Date: Wednesday, June 2, 2010 - 10:53 am

On 06/02, Roland McGrath wrote:

Because it is per-thread.

when select_bad_process() finds the task P to kill it can participate
in the core dump (sleep in exit_mm), but we should somehow inform the
thread which actually dumps the core: P->mm->core_state->dumper.

Well, we can use TIF_MEMDIE if we chose the right thread, I think.
But perhaps mm->flags |= MMF_OOM is better, it can have other user.
I dunno.

Oleg.

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Messages in current thread:
[PATCH 1/5] oom: select_bad_process: check PF_KTHREAD inst ..., KOSAKI Motohiro, (Mon May 31, 2:33 am)
[PATCH 2/5] oom: select_bad_process: PF_EXITING check shou ..., KOSAKI Motohiro, (Mon May 31, 2:35 am)
[PATCH 3/5] oom: introduce find_lock_task_mm() to fix !mm ..., KOSAKI Motohiro, (Mon May 31, 2:36 am)
[PATCH 4/5] oom: the points calculation of child processes ..., KOSAKI Motohiro, (Mon May 31, 2:37 am)
[PATCH 5/5] oom: __oom_kill_task() must use find_lock_task ..., KOSAKI Motohiro, (Mon May 31, 2:38 am)
Re: [PATCH 2/5] oom: select_bad_process: PF_EXITING check ..., Oleg Nesterov, (Mon May 31, 9:43 am)
Re: [PATCH 4/5] oom: the points calculation of child proce ..., Oleg Nesterov, (Mon May 31, 9:56 am)
Re: [PATCH 4/5] oom: the points calculation of child proce ..., KOSAKI Motohiro, (Mon May 31, 4:48 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., KAMEZAWA Hiroyuki, (Mon May 31, 5:54 pm)
Re: [PATCH 3/5] oom: introduce find_lock_task_mm() to fix ..., KAMEZAWA Hiroyuki, (Mon May 31, 5:57 pm)
Re: [PATCH 5/5] oom: __oom_kill_task() must use find_lock_ ..., KAMEZAWA Hiroyuki, (Mon May 31, 6:02 pm)
Re: [PATCH 2/5] oom: select_bad_process: PF_EXITING check ..., KOSAKI Motohiro, (Mon May 31, 6:10 pm)
Re: [PATCH 2/5] oom: select_bad_process: PF_EXITING check ..., Oleg Nesterov, (Tue Jun 1, 1:18 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., David Rientjes, (Tue Jun 1, 1:36 pm)
Re: [PATCH 2/5] oom: select_bad_process: PF_EXITING check ..., David Rientjes, (Tue Jun 1, 1:39 pm)
Re: [PATCH 3/5] oom: introduce find_lock_task_mm() to fix ..., David Rientjes, (Tue Jun 1, 1:42 pm)
Re: [PATCH 5/5] oom: __oom_kill_task() must use find_lock_ ..., David Rientjes, (Tue Jun 1, 1:44 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., Oleg Nesterov, (Tue Jun 1, 2:20 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., David Rientjes, (Tue Jun 1, 2:26 pm)
[PATCH] oom: remove PF_EXITING check completely, KOSAKI Motohiro, (Wed Jun 2, 6:54 am)
[PATCH] oom: Make coredump interruptible, KOSAKI Motohiro, (Wed Jun 2, 6:54 am)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., KOSAKI Motohiro, (Wed Jun 2, 6:54 am)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., Minchan Kim, (Wed Jun 2, 8:32 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Wed Jun 2, 8:42 am)
Re: [PATCH] oom: remove PF_EXITING check completely, Oleg Nesterov, (Wed Jun 2, 8:54 am)
Re: [PATCH 3/5] oom: introduce find_lock_task_mm() to fix ..., Minchan Kim, (Wed Jun 2, 9:05 am)
Re: [PATCH] oom: Make coredump interruptible, Roland McGrath, (Wed Jun 2, 10:29 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Wed Jun 2, 10:53 am)
Re: [PATCH] oom: Make coredump interruptible, Roland McGrath, (Wed Jun 2, 11:58 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Wed Jun 2, 1:38 pm)
Re: [PATCH] oom: remove PF_EXITING check completely, David Rientjes, (Wed Jun 2, 2:02 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., David Rientjes, (Wed Jun 2, 2:09 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., Oleg Nesterov, (Wed Jun 2, 2:33 pm)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., David Rientjes, (Wed Jun 2, 2:46 pm)
Re: [PATCH] oom: remove PF_EXITING check completely, KOSAKI Motohiro, (Wed Jun 2, 9:48 pm)
Re: [PATCH] oom: remove PF_EXITING check completely, David Rientjes, (Wed Jun 2, 11:29 pm)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Thu Jun 3, 7:03 am)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., Oleg Nesterov, (Thu Jun 3, 7:27 am)
Re: [PATCH 1/5] oom: select_bad_process: check PF_KTHREAD ..., David Rientjes, (Thu Jun 3, 1:11 pm)
Re: [PATCH] oom: Make coredump interruptible, KOSAKI Motohiro, (Fri Jun 4, 3:54 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Fri Jun 4, 4:27 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Fri Jun 4, 4:34 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Wed Jun 9, 12:53 pm)
Re: [PATCH] oom: Make coredump interruptible, David Rientjes, (Wed Jun 9, 1:41 pm)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Wed Jun 9, 2:03 pm)
Re: [PATCH] oom: Make coredump interruptible, KOSAKI Motohiro, (Sun Jun 13, 4:24 am)
Re: [PATCH] oom: Make coredump interruptible, Oleg Nesterov, (Sun Jun 13, 8:53 am)
uninterruptible CLONE_VFORK (Was: oom: Make coredump inter ..., Oleg Nesterov, (Sun Jun 13, 10:13 am)
Re: [PATCH] oom: Make coredump interruptible, Roland McGrath, (Sun Jun 13, 5:26 pm)
Re: [PATCH] oom: Make coredump interruptible, Roland McGrath, (Sun Jun 13, 5:36 pm)
Re: uninterruptible CLONE_VFORK (Was: oom: Make coredump i ..., Roland McGrath, (Sun Jun 13, 5:56 pm)
Re: uninterruptible CLONE_VFORK (Was: oom: Make coredump i ..., Oleg Nesterov, (Mon Jun 14, 9:33 am)
Re: uninterruptible CLONE_VFORK (Was: oom: Make coredump i ..., Roland McGrath, (Mon Jun 14, 12:17 pm)
Re: uninterruptible CLONE_VFORK (Was: oom: Make coredump i ..., Oleg Nesterov, (Mon Jun 28, 10:33 am)
Re: uninterruptible CLONE_VFORK (Was: oom: Make coredump i ..., Roland McGrath, (Mon Jun 28, 11:04 am)