I would like to change the IRQ which my Qlogic Fibre Channel HBA is
grabbing without moving the card to a different slot. As is, the FC card
and the SCSI controller are sharing IRQ 19. I believe this is the cause
of lower bandwidth when compared to a system where they have different
IRQs. I've tried using setpci with no success. Is it possible to change
this?
Thanks,
Dave
/proc/interrutps on system 1 - bad
19: 17191 IO-APIC-level aic7xxx, aic7xxx, qlogicfc
/proc/interrutps on system 2 - good
18: 971 IO-APIC-level qlogicfc
19: 4117 IO-APIC-level aic7xxx, aic7xxx
More info from system 1:
# lspci -vs 0:9.0
00:09.0 SCSI storage controller: Q Logic: Unknown device 2200 (rev 05)
Subsystem: Unknown device 1077:0002
Flags: bus master, 66Mhz, medium devsel, latency 64, IRQ 19
I/O ports at 1400
Memory at f4100000 (32-bit, non-prefetchable)
Capabilities: [44] Power Management version 1
# setpci -v -s 0:9.0 interrupt_line=12
00:09.0:3c 12
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