[DRBD-user] Kernel panic - DRBD 8.3.6 and RHEL 5.4 x64 xen

Mike Sweetser - Adhost mikesw at adhost.com
Wed Dec 9 21:20:47 CET 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Here's the data from the kernel panic - I'm not sure where the core
would be kept to get the stack trace from.

Starting DRBD resources: [ d(backup) Unable to handle kernel paging
request at ffff81017480403c RIP: 
 [<ffffffff8836271c>] :drbd:drbd_md_read+0xd7/0x236
PGD 17b65c063 PUD 0 
Oops: 0000 [1] SMP 
last sysfs file: /module/drbd/parameters/cn_idx
CPU 0 
Modules linked in: drbd(U) nfsd exportfs nfs_acl auth_rpcgss ipv6
xfrm_nalgo crypto_api autofs4 hidp rfcomm l2cap bluetooth lockd sunrpc
dm_mirror dm_multipath scsi_dh scsi_mod parport_pc lp parport xennet
pcspkr dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache
xenblk ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 35, comm: cqueue/0 Tainted: G      2.6.18-164.6.1.el5xen #1
RIP: e030:[<ffffffff8836271c>]  [<ffffffff8836271c>]
RSP: e02b:ffff880195fa3d30  EFLAGS: 00010a06
RAX: ffff810000000000 RBX: 0000000174804000 RCX: ffff880172b847a0
RDX: ffffffffff578000 RSI: ffff810174804000 RDI: 0000000000000000
RBP: ffff880178dbb000 R08: ffff8801773c4340 R09: 0000000000000000
R10: 0000000000000010 R11: ffffffff80246ce3 R12: ffff8800000cdc00
R13: ffff8800026d6000 R14: ffff880178dbb4f8 R15: ffff880178dbb7a0
FS:  00002aba57d58710(0000) GS:ffffffff805ca000(0000)
CS:  e033 DS: 0000 ES: 0000
Process cqueue/0 (pid: 35, threadinfo ffff880195fa2000, task
Stack:  ffff880195fa3d28  ffff8800000cdc00  ffff880178dbb000
 ffff8800000cdc00  ffff88019295d1c8  ffff88019295d1c8  ffffffff88368281 
 ffff88018381ed14  ffff880172012cc0 
Call Trace:
 [<ffffffff88368281>] :drbd:drbd_nl_disk_conf+0x6b5/0xc83
 [<ffffffff803a5af9>] cn_queue_wrapper+0x0/0x23
 [<ffffffff802fb6e5>] register_disk+0x158/0x190
 [<ffffffff803a5af9>] cn_queue_wrapper+0x0/0x23
 [<ffffffff88366f8a>] :drbd:drbd_connector_callback+0xe9/0x1a8
 [<ffffffff803a5af9>] cn_queue_wrapper+0x0/0x23
 [<ffffffff803a5b04>] cn_queue_wrapper+0xb/0x23
 [<ffffffff8024f5ff>] run_workqueue+0x94/0xe4
 [<ffffffff8024bed8>] worker_thread+0x0/0x122
 [<ffffffff8029b9ec>] keventd_create_kthread+0x0/0xc4
 [<ffffffff8024bfc8>] worker_thread+0xf0/0x122
 [<ffffffff8028883e>] default_wake_function+0x0/0xe
 [<ffffffff8029b9ec>] keventd_create_kthread+0x0/0xc4
 [<ffffffff8029b9ec>] keventd_create_kthread+0x0/0xc4
 [<ffffffff80233bcd>] kthread+0xfe/0x132
 [<ffffffff80260b2c>] child_rip+0xa/0x12
 [<ffffffff8029b9ec>] keventd_create_kthread+0x0/0xc4
 [<ffffffff80233acf>] kthread+0x0/0x132
 [<ffffffff80260b22>] child_rip+0x0/0x12

Code: 8b 46 3c 0f c8 3d 6b 02 74 83 74 16 8b b5 44 08 00 00 48 c7 
RIP  [<ffffffff8836271c>] :drbd:drbd_md_read+0xd7/0x236
 RSP <ffff880195fa3d30>
CR2: ffff81017480403c
 <0>Kernel panic - not syncing: Fatal exception

Mike Sweetser, RHCT, WCSP | Systems Administrator

Adhost Internet
140 Fourth Avenue North, Suite 360, Seattle, Washington 98109 USA
P 206.404.9000    T 888.234.6781 (ADHOST-1)    F 206.404.9050
E mikesw at adhost.com    W adhost.com

> -----Original Message-----
> From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-
> bounces at lists.linbit.com] On Behalf Of Florian Haas
> Sent: Wednesday, December 09, 2009 11:47 AM
> To: drbd-user at lists.linbit.com
> Subject: Re: [DRBD-user] Kernel panic - DRBD 8.3.6 and RHEL 5.4 x64
> Can we please get a complete stack trace?
> Thanks.
> Cheers,
> Florian
> On 2009-12-09 20:37, Mike Sweetser - Adhost wrote:
> > As a followup, I tried different versions of DRBD on the Xen
> machines,
> > and was able to get it working with DRBD 8.3.2 and earlier.  8.3.3
> and
> > later causes the kernel panic.

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