Multiple breakpoint issue when debugging loadable kernel module

[Jan Kiszka]

On 2011-10-25 04:57, Vimal wrote:
> Hi,
> 
> With some suggestions from IRC folks sergiodj and SamB, I ran a git
> bisect on the HEAD of git://sourceware.org/git/gdb.git.
> 
> It seems like the first bad commit is:
> 2cdbbe44126601596aad7891de05cb7fc6bb21c8, which seems pretty big
> ~6000lines.

Wow, that saved me a lot of time. I just ran into the same issue and was
close to getting mad over the effect.

Maybe the commit is only that big because cvs-to-git conversion merged
too much into a single commit. I can't imagine that such a huge change
is done in one step.

> 
> Quoted below is my first mail to the list, with few details about the
> problem.  Also, here's an output from an actual run:
> http://pastebin.com/4PhDAHwW...
> 
> Tom Tromey: is this a known issue?

At least it is a critical one as it makes kernel module debugging nearly
impossible. I'm preparing a LinuxCon talk about how cool kernel
debugging with gdb and qemu can be - looks like I have to skip this
part... ;)

If there is anything to be done that could help analyzing the issue,
please let us know.

Jan

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