[OmniOS-discuss] R151018: kernel panic when iSCSI target goes south

Stephan Budach stephan.budach at JVM.DE
Mon Apr 25 07:27:10 UTC 2016


I have been struck by kernel panics on my OmniOS boxes lateley, when any 
one of the target hosts, where the system get it's LUNs from, 
experiences a kernel panic itself. When this happens, my RSF-1 node 
immediately panics as well. Looking at the vmdump, it shows this:

root at zfsha02gh79:/var/crash/unknown# mdb -k unix.0 vmcore.0
Loading modules: [ unix genunix specfs dtrace mac cpu.generic uppc apix 
scsi_vhci zfs sata sd ip hook neti sockfs arp usba stmf stmf_sbd mm md 
lofs random idm crypto cpc kvm ufs logindmux nsmb ptm smbsrv nfs ipc mpt 
mpt_sas pmcs emlxs ]
 > ::status
debugging crash dump vmcore.0 (64-bit) from zfsha02gh79
operating system: 5.11 omnios-r151018-ae3141d (i86pc)
image uuid: 18d57565-8b91-46ea-9469-fb0518d35e30
panic message: BAD TRAP: type=e (#pf Page fault) rp=ffffff00f8b5e590 
addr=10 occurred in module "scsi_vhci" due to a NULL pointer dereference
dump content: kernel pages only
 > ::stack
vhci_scsi_reset_target+0x75(ffffff2c7b200b88, 1, 1)
vhci_recovery_reset+0x7d(ffffff2c7ac9d080, ffffff2c7b200b88, 1, 2)
vhci_pathinfo_offline+0xe5(ffffff21d3288550, ffffff2273530838, 0)
vhci_pathinfo_state_change+0xd5(ffffff21d3288550, ffffff2273530838, 4, 0, 0)
i_mdi_pi_state_change+0x16a(ffffff2273530838, 4, 0)
mdi_pi_offline+0x39(ffffff2273530838, 0)
iscsi_lun_offline+0xb3(ffffff21f1bd4580, ffffff2c084f5d60, 0)
iscsi_sess_state_failed+0x6f(ffffff27fea82000, 3, 2a)
iscsi_sess_state_machine+0x156(ffffff27fea82000, 3, 2a)
iscsi_login_end+0x18f(ffffff286c8d6000, 15, ffffff22724e1158)

The vmdump is really big, approx 5GB compressed, but I could share that 
if necessary.


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