After reading http://etbe.coker.com.au/2008/01/28/write-intent-bitmaps/ wanted to check bitmaps, turned these on but http://blog.liw.fi/posts/write-intent-bitmaps/ caused me to do mdadm --grow --bitmap=none /dev/md3 which ended with the oops below: 2.6.31.5, raid10 array [2500705.083965] BUG: unable to handle kernel NULL pointer dereference at (null) [2500705.090142] IP: [<ffffffffa001387a>] bitmap_daemon_work+0x20a/0x500 [md_mod] [2500705.090142] PGD 0 [2500705.090142] Oops: 0002 [#1] SMP [2500705.090142] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:09:0c.0/local_cpus [2500705.090142] CPU 5 [2500705.090142] Modules linked in: pppoe pppox ppp_generic slhc configs tcp_diag inet_diag ipmi_watchdog netconsole configfs sit tunnel4 sch_sfq ext3 jbd mbcache raid1 dm_mod e1000 e1000e ipmi_devintf ipmi_si ipmi_msghandler 8021q garp stp xfs exportfs sd_mod crc_t10dif mptsas mptscsih mptbase scsi_transport_sas scsi_mod raid10 md_mod [last unloaded: scsi_wait_scan] [2500705.090142] Pid: 1423, comm: md2_raid10 xid: #0 Not tainted 2.6.31.5-0.3 #1 S5000VSA [2500705.090142] RIP: 0010:[<ffffffffa001387a>] [<ffffffffa001387a>] bitmap_daemon_work+0x20a/0x500 [md_mod] [2500705.090142] RSP: 0018:ffff8801d6cffca0 EFLAGS: 00010046 [2500705.090142] RAX: 0000000000000000 RBX: ffff8801b8aaff00 RCX: ffff8801d76c82a0 [2500705.090142] RDX: 0000000000000001 RSI: 0000000000000246 RDI: ffff8801b8aaff54 [2500705.090142] RBP: ffff8801d6cffcf0 R08: 0000000000000000 R09: 0008e260c60a0f7c [2500705.090142] R10: 6f983d4c554e7d25 R11: 00000000ffffffff R12: 0000000000000000 [2500705.090142] R13: ffffea00040c4fa0 R14: 0000000000000246 R15: 0000000000000800 [2500705.090142] FS: 0000000000000000(0000) GS:ffff8800280af000(0000) knlGS:0000000000000000 [2500705.090142] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [2500705.090142] CR2: 0000000000000000 CR3: 0000000107e95000 CR4: 00000000000006e0 [2500705.090142] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [2500705.090142] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [2500705.090142] Process md2_raid10 (pid: 1423, threadinfo ffff8801d6cfe000, task ffff8801d6cf23a0) [2500705.090142] Stack: [2500705.090142] ffff8801d6cffce0 ffff8801b8aaff54 ffff8800280c0140 faadb9534992dcbd [2500705.090142] <0> ffff8800139dcd00 ffff8801d76c8000 ffff8801d90f5368 00000000000005b1 [2500705.090142] <0> ffff8801d6cffe80 ffff8801d90f5350 ffff8801d6cffd30 ffffffffa000da6b [2500705.090142] Call Trace: [2500705.090142] [<ffffffffa000da6b>] md_check_recovery+0x3b/0x5c0 [md_mod] [2500705.090142] [<ffffffffa0024074>] cleanup_module+0x2d34/0x4140 [raid10] [2500705.090142] [<ffffffff8146adff>] ? schedule_timeout+0x15f/0x220 [2500705.090142] [<ffffffff81062740>] ? process_timeout+0x0/0x40 [2500705.090142] [<ffffffffa000b9f4>] md_register_thread+0x1b4/0x2b0 [md_mod] [2500705.090142] [<ffffffff81074c50>] ? autoremove_wake_function+0x0/0x60 [2500705.090142] [<ffffffffa000b9a0>] ? md_register_thread+0x160/0x2b0 [md_mod] [2500705.090142] [<ffffffff81074746>] kthread+0xb6/0xc0 [2500705.090142] [<ffffffff810042da>] child_rip+0xa/0x20 [2500705.090142] [<ffffffff81074690>] ? kthread+0x0/0xc0 [2500705.090142] [<ffffffff810042d0>] ? child_rip+0x0/0x20 [2500705.090142] Code: e8 ac ee ff ff 8b 7b 50 85 ff 0f 85 8b 01 00 00 48 8b 7d b8 e8 a8 97 45 e1 49 8b 55 20 49 89 c6 48 8b 43 78 8d 14 95 01 00 00 00 <0f> b3 10 48 8b 4b 30 4c 89 e6 48 8d 55 c4 48 89 df 83 e9 09 48 [2500705.090142] RIP [<ffffffffa001387a>] bitmap_daemon_work+0x20a/0x500 [md_mod] [2500705.090142] RSP <ffff8801d6cffca0> [2500705.090142] CR2: 0000000000000000 [2500705.090142] ---[ end trace 5a64b46437e34911 ]--- -- Arkadiusz Miśkiewicz PLD/Linux Team arekm / maven.pl http://ftp.pld-linux.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
