You may need to selectively enable/disable the debug trace during a
particular call.

I suspect that the problem is happening during the execution of the
ACPICA interface AcpiSetCurrentResources (aka
acpi_set_current_resources).

Here's the way I would do it:

Set a breakpoint on acpi_set_current_resources. When you get there,
enable debug output. When finished, disable debugging.

If this isn't possible with your debugger, you can always change the
source to enable/disable debugging at the start and end of
acpi_set_current_resources.

Bob


> -----Original Message-----
> From: Luck, Tony
> Sent: Friday, February 10, 2006 2:59 PM
> To: Moore, Robert; 'Thomas Renninger'; Brown, Len
> Cc: '[email protected]'; '[email protected]'
> Subject: RE: some new unaligned access while booting ia64 (HP rx2620)
> 
> > That looks good. You'll probably need to increase your dmesg buffer
> > or send the output to a serial port, since you will get megabytes
> > of info.
> 
> I only have a serial port on this machine ... but all the interesting
> output happens before it is enabled ... i.e. is buffered up in log_buf
> until the serial console is brought online.
> 
> I made log_buf as big as I could (2^21 bytes is the biggest it would
> let me go), and that is not enough for all the ACPI messages ... so
the
> initial part where the unaligned messages were printed was lost in the
> wraparound before anything could be dumped to the serial port.
> 
> Now I've got network problems in the lab ... when I can reconnect to
> my systems, I'll change lib/Kconfig.debug to allow a bigger log_buf
> and try again.
> 
> -Tony
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