Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Tuesday 30 June 2009 10:08:18 Tim Evers wrote: > Tim Evers schrieb: > > Hi, > > > > I have a iSCSI SAN server using drbd in the backend. This results in atm > > 32 logical volumes each with drbd on top and exported via iscsi. > > > > During normal operation everything is fine. But if I fire up a new drbd > > device (drbdadm up res or drbdadm adjust res) sometimes (about 1 out of > > ten times) the machine crashes with kernel panic. > > In the meantime I have investigated the problem further and was able to > make a partial snapshot of the trace resulting from the crash: > > At first I tried to simulate the problem with a test machine running the > exact copy of the production machines software (Linux Version, Kernel, > iscsi-target and drbd) while only having 1 raid controller. > > In this configuration I was not able to reproduce the error while > posting heavy load through iscsi and local disk activity and > simultaneously creating, modifying and removing drbd devices. > > Last night I configured aroung 40 new drbd devices on the production > machine and got a crash after about 35 configured devices. I made a > screenshot from my kvm screen during the crash: > > http://www.massaker.de/crash_trace_small.png > Hi Tim, This is of course very interesting, but that partial call trace is unfortunately useless. You have to try to get a full trace. E.g. by using a serial console or netconsole. -Phil -- : Dipl-Ing Philipp Reisner : LINBIT | Your Way to High Availability : Tel: +43-1-8178292-50, Fax: +43-1-8178292-82 : http://www.linbit.com DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.