scsi_scan_bus: xpt_create_path failed with status 0x34

[Desai, Kashyap]

Hi,

LSI is doing some testing on FreeBSD-8.3 <mpslsi> Driver. We are running test case where IOs are running on Drives and HBA reset in loop of 30/60 second delay.

Things are working fine for sometime 3-4 hours. Almost around ~500 iteration of HBA reset, there is no issue.
After long run we observer below prints ..

---
mpslsi0: proberegister: Unable to probe new device. Unable to allocate softc
Hard Reset with Port Enable completed in 16 seconds.
(xpt0:mpslsi0:0:1:0): scsi_scan_lun: cam_alloc_periph returned an error, can't continue probe
scsi_scan_bus: xpt_create_path failed with status 0x34, bus scan halted



mpslsi0: Queueing rescan for (xpt0:mpslsi0:0:-1:-1):
mpslsi0: (6193)->(mpssas_fw_work) Event Free: [1c]
mpslsi0: Hard Reset with Port Enable completed in 11 seconds.
camq_init: - cannot malloc array!
scsi_scan_bus: xpt_create_path failed with status 0x34, bus scan halted
mpslsi0: Completing rescan for (xpt0:mpslsi0:0:-1:-1):
----

At the end there was a kernel crash. Below is back trace.

mpslsi0: Queueing rescan for (xpt0:mpslsi0:0:-1:-1):
mpslsi0: (6205)->(mpssas_fw_work) Event Free: [1c]
mpslsi0: Hard Reset with Port Enable completed in 10 seconds.
scsi_scan_bus: xpt_create_path failed with status 0x34, bus scan halted
 
 
Fatal trap 12: page fault while in kernel mode
cpuid = 4; apic id = 32
fault virtual address   = 0x40
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0493f38
stack pointer           = 0x28:0xc52515dc
frame pointer           = 0x28:0xc52515f8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 12 (swi2: cambio)
trap number             = 12
panic: page fault
cpuid = 4
KDB: stack backtrace:
#0 0xc0a4b157 at kdb_backtrace+0x47
#1 0xc0a186b7 at panic+0x117
#2 0xc0d48cf3 at trap_fatal+0x323
#3 0xc0d48dad at trap_pfault+0xad
#4 0xc0d49b35 at trap+0x465
#5 0xc0d32a8c at calltrap+0x6
#6 0xc048e3a7 at camperiphfree+0x97
#7 0xc048e545 at cam_periph_release_locked+0x55
#8 0xc049df7d at probedone+0x136d
#9 0xc04958c1 at camisr_runqueue+0x2e1
#10 0xc0495a1f at camisr+0x13f
#11 0xc09ed78b at intr_event_execute_handlers+0x13b
#12 0xc09eef4a at ithread_loop+0x7a
#13 0xc09ea997 at fork_exit+0x97
#14 0xc0d32b04 at fork_trampoline+0x8
Uptime: 6h42m25s
mpslsi0: Completing rescan for (xpt0:mpslsi0:0:-1:-1):



Any idea if this is a known issue at CAM layer. ?


Thanks, Kashyap