Re: [storage-discuss] Safely Breaking Down iSCSI Connections

Thu, 28 Jun 2007 14:49:08 -0700 

A few people have asked me to post the bugID so here it is:
6480294- Panis in scsi_vhci while offlining lun

Jeff

Jeff Wen wrote:

Ben Rockwood wrote:

Can you post the stack trace?
I have a feeling it is a known problem that we are working on a fix for. 


Thanks.
This was a scsi_vhci bug.
It has been fixed in NV build 67.

Jeff
The following was the result of a 'iscsiadm modify discovery --static disable' after the target had become unavailable (network failure). 


> ::status
debugging crash dump vmcore.4 (64-bit) from aeon
operating system: 5.11 snv_63 (i86pc)
panic message: mutex_enter: bad mutex, lp=fffffffec99faa40 owner=3067406b73696428 thread=fffffffec1ce9b60 
dump content: kernel pages only
> ::stack
vpanic()
mutex_panic+0x73(fffffffffbc0cbd8, fffffffec99faa40)
mutex_vector_enter+0x4d4(fffffffec99faa40)
vhci_commoncap+0x15a(ffffffff05a77580, ffffffffc0331478, 0, 1, 1)
vhci_scsi_setcap+0x23(ffffffff05a77580, ffffffffc0331478, 0, 1)
scsi_ifsetcap+0x38(ffffffff05a77580, ffffffffc0331478, 0, 1)
sd_unit_detach+0x486(fffffffec05d2da8)
sddetach+0x19(fffffffec05d2da8, 0)
devi_detach+0x84(fffffffec05d2da8, 0)
detach_node+0x5f(fffffffec05d2da8, 40001)
i_ndi_unconfig_node+0xd2(fffffffec05d2da8, 4, 40001)
i_ddi_detachchild+0x2c(fffffffec05d2da8, 40001)
devi_detach_node+0x73(fffffffec05d2da8, 40001)
ndi_devi_offline+0x17f(fffffffec05d2da8, 1)
i_mdi_devinfo_remove+0x43(fffffffec0548d88, fffffffec05d2da8, 0)
i_mdi_client_free+0x106(fffffffec01f2000, fffffffefd3df300)
mdi_pi_free+0x224(fffffffec9a517c0, 0)
iscsi_lun_offline+0x1b0(fffffffec1983580, fffffffee2ed7540, 1)
iscsi_lun_destroy+0x29(fffffffec1983580, fffffffee2ed7540)
iscsi_sess_destroy+0x40(fffffffec6566000)
iscsid_del+0x4f9(fffffffec1983580, 0, 1, 0)
iscsid_disable_discovery+0x5a(fffffffec1983580, 1)
iscsi_ioctl+0x14f1(1200000000, 69534315, 8040d1c, 100001, ffffffff00e78cb8, ffffff0004c5ae9c) cdev_ioctl+0x48(1200000000, 69534315, 8040d1c, 100001, ffffffff00e78cb8, ffffff0004c5ae9c) spec_ioctl+0x86(fffffffec97e26c0, 69534315, 8040d1c, 100001, ffffffff00e78cb8, ffffff0004c5ae9c) fop_ioctl+0x37(fffffffec97e26c0, 69534315, 8040d1c, 100001, ffffffff00e78cb8, ffffff0004c5ae9c) 
ioctl+0x16b(4, 69534315, 8040d1c)
sys_syscall32+0x101()

This occurred on snv_63 AMD64.

benr.

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