From: Li Zefan <lizf@cn.fujitsu.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Pavel Emelianov <xemul@openvz.org>
Subject: kernel warning: tried to kill an mm-less task!
Date: Mon, 14 Apr 2008 15:09:01 +0800 [thread overview]
Message-ID: <4803030D.3070906@cn.fujitsu.com> (raw)
When I ran the same test program I described in a previous patch,
I got the following warning:
WARNING: at mm/oom_kill.c:320 __oom_kill_task+0x6d/0x101()
Modules linked in:
Pid: 3856, comm: a.out Not tainted 2.6.25-rc8-mm2 #37
[<ffffffff80243941>] warn_on_slowpath+0x64/0xa2
[<ffffffff80244e16>] printk+0x5e/0x7b
[<ffffffff8022b096>] page_count+0x25/0x49
[<ffffffff8022b2cd>] show_mem+0x125/0x15a
[<ffffffff8028f00f>] __oom_kill_task+0x6d/0x101
[<ffffffff8028f319>] oom_kill_process+0x16c/0x22e
[<ffffffff8028f72c>] select_bad_process+0xb0/0x122
[<ffffffff8028f8d3>] mem_cgroup_out_of_memory+0x65/0x8a
[<ffffffff802bee84>] mem_cgroup_charge_common+0xf8/0x215
[<ffffffff802a14ac>] handle_mm_fault+0x216/0x6c8
[<ffffffff8029ebca>] follow_page+0x191/0x27d
[<ffffffff80234155>] need_resched+0x31/0x4f
[<ffffffff802a1c53>] get_user_pages+0x2f5/0x3eb
[<ffffffff802a1f64>] make_pages_present+0x9e/0xca
[<ffffffff802a51fc>] mmap_region+0x38c/0x452
[<ffffffff802119c4>] arch_get_unmapped_area_topdown+0x1bf/0x2a7
[<ffffffff802a5971>] do_mmap_pgoff+0x321/0x39b
[<ffffffff805037ee>] _cond_resched+0x1c/0x5f
[<ffffffff80211715>] sys_mmap+0xf5/0x138
[<ffffffff8020c6d2>] tracesys+0xd5/0xda
---[ end trace fe959fb2f0473e7c ]---
tried to kill an mm-less task!
This showed up several times in some seconds, but then didn't appear
any more. And it's reproducable in a x86_64 box, but doesn't happen
in a x86_32 one.
And this happens both with and without the oops fixing.
Regards,
Li Zefan
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next reply other threads:[~2008-04-14 7:09 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-14 7:09 Li Zefan [this message]
2008-04-14 7:46 ` kernel warning: tried to kill an mm-less task! KAMEZAWA Hiroyuki
2008-04-14 8:01 ` Balbir Singh
2008-04-14 8:06 ` Li Zefan
2008-04-15 3:47 ` Li Zefan
2008-04-15 6:17 ` Oleg Nesterov
2008-04-15 10:19 ` s/PF_BORROWED_MM/PF_KTHREAD/ (was: kernel warning: tried to kill an mm-less task!) Oleg Nesterov
2008-04-15 17:10 ` Jeff Dike
2008-04-15 20:58 ` kernel warning: tried to kill an mm-less task! Roland McGrath
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