Re: KGDB, serial ports, and MP

[Andrew Doran <ad%NetBSD.org@localhost>]

Debugging via firewire is a much better bet..

It should only take a few hours to make the necessary adjustments to 
libkvm and the driver.  Nobody has stepped up to the plate yet though.

On Thu, May 13, 2010 at 08:26:10AM -0400, Greg Troxel wrote:
> 
>   The comment was made when I proposed that fix is that it will NOT handle
>   the MP case because splserial() doesn't affect other CPUs.  And one of
>   the commenters pointed me to places to look for how to do the MP part.
> 
> Thanks - that makes sense.
> 
>   I haven't done that yet; it's on my to-do list.  I need to find an MP
>   host to test it on...
> 
> I have boxes to test if you want to send a patch.
> 
> A related question - on what platforms do people think kgdb works
> reasonably well now (in netbsd-5, and current)?  Someone here has run
> into problems on amd64 with register ordering on transfer to gdb, a
> memory overrun, and then trouble setting breakpoints.  I haven't used
> kgdb for a while, and my previous experience was on i386.
> 
>     Greg