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Go Back   Linux Archive > Redhat > Device-mapper Development

 
 
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Old 08-11-2011, 04:07 PM
 
Default Kernel panic with kmpathd

Hello,
*
In running IO and failover/failback testing with Dell MD3600f, we ran into a kernel panic (NULL pointer dereference) with process kmpathd. Here is the captured serial output for this.
*
It will usually lead to host panic or hang.
*
Any idea what caused this problem?
*
14:23:01:757* /dev/ttyS0>
14:23:01:757* /dev/ttyS0>end_request: I/O error, dev sdf, sector 2922776
14:23:01:761* /dev/ttyS0>
14:23:01:801* /dev/ttyS0>end_request: I/O error, dev sdf, sector 2919704
14:23:01:801* /dev/ttyS0>
14:23:01:825* /dev/ttyS0>end_request: I/O error, dev sdf, sector 2893056
14:23:01:829* /dev/ttyS0>
14:23:01:861* /dev/ttyS0>end_request: I/O error, dev sdf, sector 2921752
14:23:01:865* /dev/ttyS0>
14:23:02:013* /dev/ttyS0>end_request: I/O error, dev sdf, sector 2924832
14:23:02:017* /dev/ttyS0>
14:23:22:081* /dev/ttyS0>device-mapper: multipath: Failing path 65:32.
14:23:22:085* /dev/ttyS0>
14:23:43:877* /dev/ttyS0>Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP:
14:23:43:885* /dev/ttyS0>
14:23:43:885* /dev/ttyS0> [<ffffffff8004d77e>] run_workqueue+0x69/0xf6
14:23:43:889* /dev/ttyS0>
14:23:43:889* /dev/ttyS0>PGD 2011cd067 PUD 1f051d067 PMD 0
14:23:43:889* /dev/ttyS0>
14:23:43:889* /dev/ttyS0>Oops: 0002 [1] SMP
14:23:43:893* /dev/ttyS0>
14:23:43:893* /dev/ttyS0>last sysfs file: /devices/pci0000:00/0000:00:07.0/0000:06:00.1/host4/rport-4:0-0/targ
14:23:43:901* /dev/ttyS0>et4:0:0/4:0:0:10/timeout
14:23:43:901* /dev/ttyS0>
14:23:43:901* /dev/ttyS0>CPU 9
14:23:43:905* /dev/ttyS0>
14:23:43:905* /dev/ttyS0>Modules linked in: autofs4 hidp nls_utf8 cifs rfcomm l2cap bluetooth lockd sunrpc be2iscsi ib_iser rdma_cm ib
14:23:43:913* /dev/ttyS0>_cm iw_cm ib_sa ib_mad ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i iw_cxgb3 ib_core cxg
14:23:43:921* /dev/ttyS0>b3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi loop dm_round_robin s
14:23:43:933* /dev/ttyS0>csi_dh_rdac(U) dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec i2c_core dell_wmi wmi b
14:23:43:941* /dev/ttyS0>utton battery asus_acpi acpi_memhotplug ac parport_pc lp parport sr_mod cdrom tpm_tis tpm i7core_edac edac
14:23:43:949* /dev/ttyS0>_mc tpm_bios serio_raw sg(U) bnx2 pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapsho
14:23:43:957* /dev/ttyS0>t dm_zero dm_mirror dm_log dm_mod qla2xxx scsi_transport_fc ata_piix libata shpchp megaraid_sas sd_mod s
14:23:43:969* /dev/ttyS0>csi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
14:23:43:973* /dev/ttyS0>
14:23:43:973* /dev/ttyS0>Pid: 4429, comm: kmpathd/9 Tainted: G***** 2.6.18-238.el5 #1
14:23:43:977* /dev/ttyS0>
14:23:43:977* /dev/ttyS0>RIP: 0010:[<ffffffff8004d77e>]* [<ffffffff8004d77e>] run_workqueue+0x69/0xf6
14:23:43:985* /dev/ttyS0>
14:23:43:985* /dev/ttyS0>RSP: 0018:ffff81062b4c5e40* EFLAGS: 00010006
14:23:43:989* /dev/ttyS0>
14:23:43:989* /dev/ttyS0>RAX: 0000000000000000 RBX: ffff81062e588ea0 RCX: 0000000000000000
14:23:43:993* /dev/ttyS0>
14:23:43:993* /dev/ttyS0>RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff81032f972140
14:23:44:001* /dev/ttyS0>
14:23:44:001* /dev/ttyS0>RBP: ffff81062e588ea8 R08: ffff81032f972190 R09: 000000000052ac18
14:23:44:005* /dev/ttyS0>
14:23:44:005* /dev/ttyS0>R10: 0000000000000000 R11: ffff810085c03af0 R12: ffff81032f972140
14:23:44:009* /dev/ttyS0>
14:23:44:009* /dev/ttyS0>R13: 0000000000000246 R14: 0000000000000000 R15: 0000000000000000
14:23:44:017* /dev/ttyS0>
14:23:44:017* /dev/ttyS0>FS:* 0000000000000000(0000) GS:ffff81032fdd2840(0000) knlGS:0000000000000000
14:23:44:025* /dev/ttyS0>
14:23:44:025* /dev/ttyS0>CS:* 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
14:23:44:029* /dev/ttyS0>
14:23:44:029* /dev/ttyS0>CR2: 0000000000000008 CR3: 00000001d98a3000 CR4: 00000000000006e0
14:23:44:033* /dev/ttyS0>
14:23:44:033* /dev/ttyS0>Process kmpathd/9 (pid: 4429, threadinfo ffff81062b4c4000, task ffff81032d2300c0)
14:23:44:063* /dev/ttyS0>
14:23:44:063* /dev/ttyS0>Stack:* ffff81062b4c5e80 ffff81032f972140 ffffffff80049ff6 ffff81062b435da8
14:23:44:065* /dev/ttyS0>
14:23:44:065* /dev/ttyS0> 0000000000000282 ffff81062b435d98 ffffffff800a269c ffffffff8004a0e6
14:23:44:065* /dev/ttyS0>
14:23:44:065* /dev/ttyS0> 0000000000000000 ffff81032d2300c0 ffffffff8008e40a 0000000000100100
14:23:44:065 */dev/ttyS0>
14:23:44:065* /dev/ttyS0>Call Trace:
14:23:44:065* /dev/ttyS0>
14:23:44:065* /dev/ttyS0> [<ffffffff80049ff6>] worker_thread+0x0/0x122
14:23:44:065* /dev/ttyS0>
14:23:44:065* /dev/ttyS0> [<ffffffff800a269c>] keventd_create_kthread+0x0/0xc4
14:23:44:071* /dev/ttyS0>
14:23:44:071* /dev/ttyS0> [<ffffffff8004a0e6>] worker_thread+0xf0/0x122
14:23:44:073* /dev/ttyS0>
14:23:44:073* /dev/ttyS0> [<ffffffff8008e40a>] default_wake_function+0x0/0xe
14:23:44:077* /dev/ttyS0>
14:23:44:077* /dev/ttyS0> [<ffffffff800a269c>] keventd_create_kthread+0x0/0xc4
14:23:44:085* /dev/ttyS0>
14:23:44:085* /dev/ttyS0> [<ffffffff80032974>] kthread+0xfe/0x132
14:23:44:089* /dev/ttyS0>
14:23:44:089* /dev/ttyS0> [<ffffffff8005dfb1>] child_rip+0xa/0x11
14:23:44:089* /dev/ttyS0>
14:23:44:089* /dev/ttyS0> [<ffffffff800a269c>] keventd_create_kthread+0x0/0xc4
14:23:44:097* /dev/ttyS0>
14:23:44:097* /dev/ttyS0> [<ffffffff80032876>] kthread+0x0/0x132
14:23:44:101* /dev/ttyS0>
14:23:44:101* /dev/ttyS0> [<ffffffff8005dfa7>] child_rip+0x0/0x11
14:23:44:101* /dev/ttyS0>
14:23:44:101* /dev/ttyS0>
14:23:44:101* /dev/ttyS0>
14:23:44:101* /dev/ttyS0>
14:23:44:105* /dev/ttyS0>
14:23:44:105* /dev/ttyS0>Code: 48 89 42 08 48 89 10 48 89 6d 08 48 89 6d 00 e8 76 73 01 00
14:23:44:109* /dev/ttyS0>
14:23:44:109* /dev/ttyS0>RIP* [<ffffffff8004d77e>] run_workqueue+0x69/0xf6
14:23:44:113* /dev/ttyS0>
14:23:44:113* /dev/ttyS0> RSP <ffff81062b4c5e40>
14:23:44:117* /dev/ttyS0>
*
Thanks,
Yanqing
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