[DRBD-user] DRBD 8.4.1 on CentOS6 with CLVM and GFS2 - kernel oops and hang

Dirk dirk.schulz at kinzesberg.de
Wed Feb 29 13:33:56 CET 2012

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


Hi folks,

I have setup a 2 node cluster on CentOS 6 using DRBD (dual primary) and 
RHCS with CLVM and GFS2. So far, RHCS is just set up with node 
definition to make GFS2 usable.
I have compiled DRBD 8.4.1 myself against the Xen 4.1.2 kernel from 
Steve Haigh I am using.

I have followed the current DRBD documentation concerning usage in a 
Redhat Cluster and CLVM/GFS2 to the bit, but every time I start the 
Cluster and mount the DRBD based GFS2 volume, after short time (approx. 
1 minute) the kernel of one node oopses like that:

> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:Oops: 0000 [#1] SMP
>
> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:last sysfs file: /sys/kernel/dlm/VirtSpace01/control
>
> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:Stack:
>
> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:Call Trace:
>
> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:Code: 89 5d d8 4c 89 65 e0 4c 89 6d e8 4c 89 75 f0 4c 89 7d f8 
> 0f 1f 44 00 00 4c 8b 6f 58 49 89 fc 85 f6 89 f3 49 8b 7d 08 4d 8b 7d 
> 00 <48> 8b 47 08 4d 8b 37 48 8b 40 48 75 0e 41 f6 44 24 18 01 ba fb
>
> Message from syslogd at pclus3cent6-01 at Feb 29 12:39:35 ...
>  kernel:CR2: 0000000000000008
>

and the message log contains

> Feb 29 12:39:35 pclus3cent6-01 kernel: Modules linked in: gfs2 dlm 
> configfs drbd ebtable_nat ebtables tun libcrc32c sunrpc bridge stp llc 
> bonding ipt_REJECT ipt_LOG xt_recent ip6t_REJECT nf_conntrack_ipv6 
> xt_state nf_conntrack ip6table_filter ip6_tables ipv6 xen_gntdev 
> xen_evtchn xenfs bnx2 ics932s401 ibmaem ibmpex ipmi_msghandler 
> serio_raw pcspkr i2c_i801 iTCO_wdt iTCO_vendor_support i5k_amb hwmon 
> i5000_edac edac_core ioatdma dca e1000e ses enclosure sg shpchp ext4 
> mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif ata_generic pata_acpi 
> ata_piix aacraid radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core 
> dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nf_defrag_ipv4]
>
> Feb 29 12:39:35 pclus3cent6-01 kernel: [<ffffffffa04de865>] 
> drbd_make_request+0x325/0x330 [drbd]

I am sure I have seen a thread concerning this googling through mail 
archives, but I do not find it any more, so please bear with me if the 
problem has been already solved once.

Is this a known issue with DRBD 8.4.1 on CentOS 6?
What can I do to troubleshoot this? I do not have any idea on where to 
start yet.

Any hint or help is appreciated.

Dirk



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