[Xen-users] xen host kernel panic

[Margus Roo <margusja@xxxxxxx>]

CentOS 5.6
Linux 2.6.18-238.9.1.el5xen xen.x86_64
xen 3.0.3-120.el5_6.1

I have storage server connected to the xen host server via infini band 
iscsi iser.
InfiniBand: Mellanox Technologies MT26428 [ConnectX VPI PCIe 2.0 5GT/s - 
IB QDR / 10GigE] (rev b0)
I use openib.noarch 1.4.1-5.el5

line from lsmod:
ib_core               105157  15 
ib_iser,ib_srp,rds,ib_sdp,ib_ipoib,rdma_ucm,rdma_cm,ib_ucm,ib_uverbs,ib_umad,ib_cm,iw_cm,ib_sa,mlx4_ib,ib_mad
some lines from dmsg:
ib_srp: ASYNC event= 17 on device= mlx4_0
ib_srp: ASYNC event= 11 on device= mlx4_0
ib_srp: ASYNC event= 9 on device= mlx4_0
scsi4 : iSCSI Initiator over TCP/IP
  Vendor: IET       Model: Controller        Rev: 0001
  Type:   RAID                               ANSI SCSI revision: 05
scsi 4:0:0:0: Attached scsi generic sg2 type 12
  Vendor: IET       Model: VIRTUAL-DISK      Rev: 0001
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sdc: 20971520 512-byte hdwr sectors (10737 MB)
sdc: Write Protect is off
sdc: Mode Sense: 49 00 00 08
SCSI device sdc: drive cache: write back
SCSI device sdc: 20971520 512-byte hdwr sectors (10737 MB)
sdc: Write Protect is off
sdc: Mode Sense: 49 00 00 08
SCSI device sdc: drive cache: write back
 sdc: sdc1 sdc2
sd 4:0:0:1: Attached scsi disk sdc
sd 4:0:0:1: Attached scsi generic sg3 type 0
  Vendor: IET       Model: VIRTUAL-DISK      Rev: 0001
  Type:   Direct-Access                      ANSI SCSI revision: 05
SCSI device sdd: 1048576000 512-byte hdwr sectors (536871 MB)
sdd: Write Protect is off
sdd: Mode Sense: 49 00 00 08
SCSI device sdd: drive cache: write back
SCSI device sdd: 1048576000 512-byte hdwr sectors (536871 MB)
sdd: Write Protect is off
sdd: Mode Sense: 49 00 00 08
SCSI device sdd: drive cache: write back
 sdd: sdd1 sdd2 sdd3 sdd4 < sdd5 >
sd 4:0:0:2: Attached scsi disk sdd
sd 4:0:0:2: Attached scsi generic sg4 type 0

sdc and sdd are devices from storage server.

I got several times xen host server pernel panic.
RIP [<ffff885d5f04>] :ib_ser: iser_reg_rdma_mem+0x111/0x77a
...
Kernel panic - no syncing: Fatal exception

Here is a screen shot I took: 
http://margus.roo.ee/wp-content/uploads/2011/04/xen_host_crash.png
-- with
Margus Roo
http://www.okia.ee


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