Re: PROBLEM: lpfc module kernel panics when SCSI devices disconnect (resend with no HTML)

On Tue, 2012-08-14 at 14:19 -0400, Keith Lawson wrote:
> I believe we're encountering a bug in the lpfc module with our SLES
> 11 
> SP1 systems running on HP blades in a C7000 enclosure connected to a
> SAN 
> and virtual tape library. Please find my bug report below. We've had
> HP 
> engaged for this issue for approximately 7 weeks now and aren't any 
> closer to solving the problem so I'm hoping you can help.
> 
> [1.] One line summary of the problem:
> lpfc module kernel panics when SCSI devices disconnect from host.
> 
> [2.] Full description of the problem/report:
> We have several BL460c blades in a C7000 enclosure connected to an HP 
> EVA 8400 and an HP VLS 6840 tape library over fiber channel. Due to
> an 
> know issue on the VLS our backup administrator has to reset the tape 
> library weekly which causes the virtual tape devices on the servers
> to 
> be removed and this is causing a kernel panic almost every time that 
> happens. Kdumps indicated that the panic is happening inside the lpfc 
> kernel module. The module also seems to be sensitive to I/O timeouts
> on 
> the EVA but we can't reliably reproduce panics due to disk related 
> problems.
> 
> [3.] Keywords (i.e., modules, networking, kernel):
> lpfc module, SCSI,HP EVA 8400,HP VLS6840, HP C7000 enclosure, HP 
> ProLiant BL460c blade