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List:       freebsd-bugs
Subject:    misc/64921: vmstat -i is not reporting IRQ usage on a shared IRQ
From:       Matt <mfischer () keldon ! net>
Date:       2004-03-30 5:41:14
Message-ID: 200403300541.i2U5fEt3008514 () www ! freebsd ! org
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> Number:         64921
> Category:       misc
> Synopsis:       vmstat -i is not reporting IRQ usage on a shared IRQ
> Confidential:   no
> Severity:       non-critical
> Priority:       medium
> Responsible:    freebsd-bugs
> State:          open
> Quarter:        
> Keywords:       
> Date-Required:
> Class:          sw-bug
> Submitter-Id:   current-users
> Arrival-Date:   Mon Mar 29 21:50:20 PST 2004
> Closed-Date:
> Last-Modified:
> Originator:     Matt
> Release:        4.9
> Organization:
> Environment:
> Description:
My system has/had 2 cards trying to use IRQ5.  One was a PCI sound card (which BSD \
did not recognize on boot), the other was a 3c509 network card.    Dmesg showed that \
both cards were loaded onto IRQ5.  However, vmstat -i did not list any cards as using \
IRQ5.  This caused me some headaches when I was trying to figure out why my \
networking wasnt working correctly.  I removed the sound card and rebooted, then \
vmstat -i showed IRQ 5 in use by driver ep0.  It seems like vmstat was confused due \
to the conflict.  Note that it did not show "mux" for IRQ5, it simply was not listed!
> How-To-Repeat:
Unsure.  My system does show IRQ9 as a mux, so perhaps you need 2 cards, one of which \
is an "unknown PCI card".  Another clue could be that the PCI card was unknown and \
the 3c509 card was using ISA.  Also note that even my BIOS attempted to map them both \
to IRQ5, WinXP remaps the 3c509 card to IRQ11...
> Fix:
      
> Release-Note:
> Audit-Trail:
> Unformatted:
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