Re: [Xen-users] xen host kernel panic

[Margusja <margus@xxxxxx>]

I set up xen server again. Mounted iscsi target without iser suport and 
the system is stable. No more kernel panics.
But without iser supert iscsi target access much slower :(

Tervitades, Margus (Margusja) Roo
+372 51 48 780
http://margus.roo.ee
msn: margusja@xxxxxxxxx
skype: margusja


On 4/30/11 9:47 PM, Margus Roo wrote:
> 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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