linux-kernel - Re: 3.0.3 oops. memory related?

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Message-Id: <20110905094956.186d3830.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 5 Sep 2011 09:49:56 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Anders <aeriksson2@...il.com>
Cc:	linux-mm <linux-mm@...ck.org>, linux-kernel@...r.kernel.org
Subject: Re: 3.0.3 oops. memory related?

On Sun, 04 Sep 2011 20:49:42 +0200
Anders <aeriksson2@...il.com> wrote:

> I've got kdump setup to collect oopes. I found this in the log. Not sure
> what it's related to.
> 

> <4>[47900.533010]  [<ffffffff810ab79f>] ?
> mem_cgroup_count_vm_event+0x15/0x67
> <4>[47900.533010]  [<ffffffff810987e5>] ? handle_mm_fault+0x3b/0x1e8
> <4>[47900.533010]  [<ffffffff81049bb3>] ? sched_clock_local+0x13/0x76
> <4>[47900.533010]  [<ffffffff8101bdb0>] ? do_page_fault+0x31a/0x33f
> <4>[47900.533010]  [<ffffffff81022b80>] ? check_preempt_curr+0x36/0x62
> <4>[47900.533010]  [<ffffffff8104bb23>] ? ktime_get_ts+0x65/0xa6
> <4>[47900.533010]  [<ffffffff810bfd2c>] ?
> poll_select_copy_remaining+0xce/0xed
> <4>[47900.533010]  [<ffffffff814c4b4f>] ? page_fault+0x1f/0x30

I'll check memcg but...not sure what parts in above log are garbage.
At quick glance, mem_cgroup_count_vm_event() does enough NULL check
but faulted address was..

> <0>[47900.533010] CR2: ffffc5217e257cf0

This seems not NULL referencing.

#define VMALLOC_START    _AC(0xffffc90000000000, UL)
#define VMALLOC_END      _AC(0xffffe8ffffffffff, UL)

This is not vmalloc area...hmm. could you show your disassemble of
mem_cgroup_count_vm_event() ? and .config ?

Thanks,
-Kame 





> -Anders
> 
> 
> <0>[47900.532505] Oops: 0000 [#1] PREEMPT SMP
> <4>[47900.532618] CPU 1
> <4>[47900.532668] Modules linked in: saa7134_alsa tda1004x saa7134_dvb
> videobuf_dvb dvb_core ir_kbd_i2c tda827x snd_hda_codec_realtek tda8290
> tuner saa7134 videobuf_dma_sg snd_hda_intel videobuf_core v4l2_common
> videodev snd_hda_codec ir_lirc_codec lirc_dev sg ir_sony_decoder
> ir_jvc_decoder v4l2_compat_ioctl32 tveeprom ir_rc6_decoder rc_imon_mce
> ir_rc5_decoder atiixp rtc_cmos ir_nec_decoder imon rc_core parport_pc
> parport i2c_piix4 pcspkr snd_hwdep asus_atk0110
> <4>[47900.533010]
> <4>[47900.533010] Pid: 23858, comm: mencoder Not tainted 3.0.3-dirty #37
> System manufacturer System Product Name/M2A-VM HDMI
> <4>[47900.533010] RIP: 0010:[<ffffffff81097d18>]  [<ffffffff81097d18>]
> handle_pte_fault+0x24/0x70a
> <4>[47900.533010] RSP: 0000:ffff880024c27db8  EFLAGS: 00010296
> <4>[47900.533010] RAX: 0000000000000cf0 RBX: ffff88006c3b2a68 RCX:
> ffffc5217e257cf0
> <4>[47900.533010] RDX: 000000000059effe RSI: ffff88006c3b2a68 RDI:
> ffff88006d6d2ac0
> <4>[47900.533010] RBP: ffffc5217e257cf0 R08: ffff880024d3b010 R09:
> 0000000000000028
> <4>[47900.533010] R10: ffffffff81049bb3 R11: ffff880077c10a80 R12:
> ffff88006d6d2ac0
> <4>[47900.533010] R13: ffff880025ee4050 R14: ffff88006c3b2a68 R15:
> 000000000059effe
> <4>[47900.533010] FS:  00007fe0ee868700(0000) GS:ffff880077c80000(0000)
> knlGS:0000000000000000
> <4>[47900.533010] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> <4>[47900.533010] CR2: ffffc5217e257cf0 CR3: 000000006eb49000 CR4:
> 00000000000006e0
> <4>[47900.533010] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> <4>[47900.533010] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> <4>[47900.533010] Process mencoder (pid: 23858, threadinfo
> ffff880024c26000, task ffff880025ee4050)
> <0>[47900.533010] Stack:
> <4>[47900.533010]  0000000000004000 0000000000000000 0000000000000000
> 0000000000004000
> <4>[47900.533010]  0000000000000028 0000000000000000 ffff880024d3b010
> ffffffff810ab79f
> <4>[47900.533010]  0000000000000000 000000000059effe 000000000059effe
> ffffffff810987e5
> <0>[47900.533010] Call Trace:
> <4>[47900.533010]  [<ffffffff810ab79f>] ?
> mem_cgroup_count_vm_event+0x15/0x67
> <4>[47900.533010]  [<ffffffff810987e5>] ? handle_mm_fault+0x3b/0x1e8
> <4>[47900.533010]  [<ffffffff81049bb3>] ? sched_clock_local+0x13/0x76
> <4>[47900.533010]  [<ffffffff8101bdb0>] ? do_page_fault+0x31a/0x33f
> <4>[47900.533010]  [<ffffffff81022b80>] ? check_preempt_curr+0x36/0x62
> <4>[47900.533010]  [<ffffffff8104bb23>] ? ktime_get_ts+0x65/0xa6
> <4>[47900.533010]  [<ffffffff810bfd2c>] ?
> poll_select_copy_remaining+0xce/0xed
> <4>[47900.533010]  [<ffffffff814c4b4f>] ? page_fault+0x1f/0x30
> <0>[47900.533010] Code: 41 5d 41 5e 41 5f c3 41 57 49 89 d7 41 56 41 55
> 41 54 49 89 fc 55 48 89 cd 53 48 89 f3 48 83 ec 68 4c 89 44 24 30 44 89
> 4c 24 20 <4c> 8b 31 44 89 f0 25 ff 0f 00 00 a9 01 01 00 00 0f 85 22 06 00
> <1>[47900.533010] RIP  [<ffffffff81097d18>] handle_pte_fault+0x24/0x70a
> <4>[47900.533010]  RSP <ffff880024c27db8>
> <0>[47900.533010] CR2: ffffc5217e257cf0
> 
> 
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