PCI MSI (was Re: What current Dell Systems are supported/work)

[John Baldwin]

On Friday 18 January 2008 05:30:06 am Parv wrote:
> (Dropped Vivek K from recipient list; edited the URLs in my previous
> message.)
> 
> in message <200801171520.25555.jhb at freebsd.org>,
> wrote John Baldwin thusly...
> >
> > On Thursday 17 January 2008 06:05:17 am Parv wrote:
> ...
> > > Speaking of MSI being on by default in recent 6-STABLE ... well,
> > > that caused my ThinkPad T61 (8859-CTO) ...
> > >
> > >   dmesg:
> > >   http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8897-cto/sys/dmesg
> > >
> > >   kernel (combined for easy perusal):
> > >   http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8897-cto/cf/kern/combined/T61-SMP.debug--combined
> > >
> > >   /boot/device.hints:
> > >   http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8897-cto/cf/boot/device.hints
> > >
> > >
> > > ... to go in panic[0]
> ...
> > >   [0] I could not save the dump for neither do I have access to
> > >       serial console, nor could the file system be mounted.
> > >       Missing also here is a digital camera.  If anybody is
> > >       interested, I could write screen down, and repeat to them.
> >
> > For starters, can you get the output of 'pciconf -lc'?
> 
> Hi John,
> 
> You can find pciconf -lc at ...
> 
>   http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8897-cto/sys/pciconf-lc
> 
>   and pciconf -lv, just in case ...
>   http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8897-cto/sys/pciconf-lv
> 
> 
> > Secondly, I really will need the kernel panic message.  If it is a
> > page fault (trap 12) then write down the faulting virtual address
> > and the faulting IP.  If you can scribble down any of the stack
> > trace from DDB that would be helpful as well.
> 
> There was no page fault or trap 12 message when the panic happened.
> After some of messages are printed (as in dmesg), kdb is entered ...
> 
>   ioapic0: Assigning PCI IRQ 23 to local APIC 1
>   msi: Assigning MSI IRQ 256 to local APIC 0
>   panic: blockabke sleep block (sleep mutex) msi @ /misc/src-6/sys/i386/i386/msi.c:381
>   cpuid: 0
>   kdb: stack backtrace
>   kbd_backtrace( c0adc531,0,c0abaafd,c1020c34,c0bab700,...) at ... \
>     [I skipped from here to the "db>" prompt]
>   .
>   .
>   .
> 
> Tomorrow, rather later today, I will type up the "trace" output.
> Please let me know if you would like to see any other output that I
> could possibly provide.

This is good enough for me to see the bug, I'll work on fixing it.  There are
some locking changes in the x86 interrupt code I need to MFC.

-- 
John Baldwin