From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiro SEKIBA Subject: Re: Crash... Date: Wed, 29 Jul 2009 13:40:56 +0900 Message-ID: <874osw14pz.wl%jir@sekiba.com> References: <9cdbb57f0907231420y4122d649y69fee2273a05b4cc@mail.gmail.com> <873a8jhsbd.wl%jir@sekiba.com> <87eis0mcev.wl%jir@sekiba.com> <20090729.124638.38314632.ryusuke@osrg.net> Reply-To: NILFS Users mailing list Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20090729.124638.38314632.ryusuke-sG5X7nlA6pw@public.gmane.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: users-bounces-JrjvKiOkagjYtjvyW6yDsg@public.gmane.org Errors-To: users-bounces-JrjvKiOkagjYtjvyW6yDsg@public.gmane.org To: NILFS Users mailing list Hi, At Wed, 29 Jul 2009 12:46:38 +0900 (JST), Ryusuke Konishi wrote: > > Hi, > On Wed, 29 Jul 2009 11:49:12 +0900, Jiro SEKIBA wrote: > > Hi, > > > > > I tried to reproduce the situation, but I can not reproduce the bug > > > with rc4, rc4+experimental on debian/lenny. > > > > Well, when I tried I got different kernel dump. > > I don't know if it's related or not, but just in case. > > > > I got following with rc4 with device mapper, created nilfs2 filesystem on > > it during rsync on the filesystem. > > shrink_page_list() is a core memory management function to reclaim > free pages. > > Could you send me the disassembled source of mm/vmscan.o ? > You cat get it by using objdump command: Here is the corresponded dump of shrink_page_list: ee4: 85 c0 test %eax,%eax ee6: 0f 84 d1 02 00 00 je 11bd eec: f0 80 65 d8 ef lock andb $0xef,-0x28(%rbp) ef1: 48 c7 c6 00 00 00 00 mov $0x0,%rsi ef8: 48 c7 c7 00 00 00 00 mov $0x0,%rdi eff: 31 c0 xor %eax,%eax f01: e8 00 00 00 00 callq f06 f06: e9 b6 01 00 00 jmpq 10c1 f0b: 49 8b 44 24 58 mov 0x58(%r12),%rax f10: 48 83 38 00 cmpq $0x0,(%rax) f14: 0f 84 79 02 00 00 je 1193 f1a: 65 48 8b 04 25 00 00 mov %gs:0x0,%rax f21: 00 00 f23: f6 40 16 80 testb $0x80,0x16(%rax) looks like <48> is cmpq at f10. > $ cd linux/mm > $ objdump -D vmscan.o > vmscan.s > > The instruction in question is that has the code "<48>" in the > following sequence. > > > [405816.060688] Code: c0 0f 84 d1 02 00 00 f0 80 65 d8 ef 48 c7 c6 e0 b9 2a 81 48 c7 c7 26 fc 32 81 31 c0 e8 02 d0 1e 00 e9 b6 01 00 00 49 8b 44 24 58 <48> 83 38 00 0f 84 79 02 00 00 65 48 8b 04 25 00 b0 00 00 f6 40 > > Cheers, > Ryusuke Konishi > > > [405816.059174] general protection fault: 0000 [#1] SMP > > [405816.059205] last sysfs file: /sys/block/dm-0/removable > > [405816.059233] CPU 0 > > [405816.059255] Modules linked in: dm_mod nilfs2 ipv6 loop snd_hda_codec_realtek i2c_i801 i2c_core iTCO_wdt serio_raw snd_hda_intel snd_hda_codec pcspkr psmouse snd_pcm snd_timer snd button processor soundcore intel_agp snd_page_alloc evdev ext3 jbd mbcache raid10 raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 multipath linear md_mod sg sr_mod sd_mod cdrom ahci libata scsi_mod tg3 libphy uhci_hcd ehci_hcd thermal fan thermal_sys > > [405816.059462] Pid: 215, comm: kswapd0 Not tainted 2.6.31-rc4 #1 N8-S720XMZCUUA2 > > [405816.059504] RIP: 0010:[] [] shrink_page_list+0x2ac/0x609 > > [405816.059554] RSP: 0018:ffff88016cec1a40 EFLAGS: 00010282 > > [405816.059579] RAX: e7d50c6d4d1428d2 RBX: ffffea0003f5fbb0 RCX: 0000000000000800 > > [405816.059621] RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000000 > > [405816.059663] RBP: ffffea0003f5fbd8 R08: 0000000000000001 R09: ffff88016fc075c0 > > [405816.059705] R10: 00003ffffffff000 R11: ffff88007a26f880 R12: ffff8801506f41a8 > > [405816.059747] R13: 0000000000000001 R14: 000000000000e800 R15: ffff88016cec1e10 > > [405816.059789] FS: 0000000000000000(0000) GS:ffff880028028000(0000) knlGS:0000000000000000 > > [405816.059833] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > > [405816.059858] CR2: 0000000001ae9618 CR3: 000000016c802000 CR4: 00000000000406f0 > > [405816.059900] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > [405816.059943] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > > [405816.059985] Process kswapd0 (pid: 215, threadinfo ffff88016cec0000, task ffff88016f27f930) > > [405816.060028] Stack: > > [405816.060047] 0000000000000001 ffff88016cec1af0 0000000000000000 ffff88016cec1cb0 > > [405816.060078] <0> 0000000000000000 0000000000000017 0000000000000009 0000000000000001 > > [405816.060124] <0> ffffea00039702b8 ffffea0004aa0458 ffffea0004aa0810 ffffea0003970248 > > [405816.060185] Call Trace: > > [405816.060208] [] ? common_interrupt+0xe/0x13 > > [405816.060234] [] ? isolate_pages_global+0xa9/0x1f3 > > [405816.060262] [] ? shrink_list+0x2d8/0x5ec > > [405816.060289] [] ? proc_delete_inode+0x0/0x40 > > [405816.060317] [] ? determine_dirtyable_memory+0xd/0x1d > > [405816.060345] [] ? get_dirty_limits+0x1d/0x256 > > [405816.060371] [] ? __switch_to+0xae/0x266 > > [405816.060397] [] ? shrink_zone+0x283/0x335 > > [405816.060427] [] ? mb_cache_shrink_fn+0x26/0x117 [mbcache] > > [405816.060456] [] ? shrink_slab+0x141/0x153 > > [405816.060482] [] ? kswapd+0x482/0x631 > > [405816.060507] [] ? isolate_pages_global+0x0/0x1f3 > > [405816.060536] [] ? autoremove_wake_function+0x0/0x2e > > [405816.060564] [] ? kswapd+0x0/0x631 > > [405816.060588] [] ? kthread+0x84/0x8c > > [405816.060614] [] ? child_rip+0xa/0x20 > > [405816.060639] [] ? kthread+0x0/0x8c > > [405816.060664] [] ? child_rip+0x0/0x20 > > [405816.060688] Code: c0 0f 84 d1 02 00 00 f0 80 65 d8 ef 48 c7 c6 e0 b9 2a 81 48 c7 c7 26 fc 32 81 31 c0 e8 02 d0 1e 00 e9 b6 01 00 00 49 8b 44 24 58 <48> 83 38 00 0f 84 79 02 00 00 65 48 8b 04 25 00 b0 00 00 f6 40 > > [405816.060819] RIP [] shrink_page_list+0x2ac/0x609 > > [405816.060847] RSP > > [405816.061045] ---[ end trace c44a8d41c1aab2f3 ]--- > > > > > > > > > > -- > > Jiro SEKIBA > > _______________________________________________ > > users mailing list > > users-JrjvKiOkagjYtjvyW6yDsg@public.gmane.org > > https://www.nilfs.org/mailman/listinfo/users > _______________________________________________ > users mailing list > users-JrjvKiOkagjYtjvyW6yDsg@public.gmane.org > https://www.nilfs.org/mailman/listinfo/users > > > -- Jiro SEKIBA