kdb on SMP

[Hua Qin]

Thanks, Keith,

I noticed that later too.

So "bpa" will have the same problem? 

How about "bph" and "bpha", since they are
using Pentium debug registers other that int3 mechanism, they don't have
these problem.

Thanks!
Hua




On Sat, 22 Mar 2003, Keith Owens wrote:

> On Fri, 21 Mar 2003 16:35:02 -0500 (EST), 
> Hua Qin <qinhua at networks.ecse.rpi.edu> wrote:
> >I downloaded 2.4.20 kernel from kernel.org, and patch
> >kdb-v3.0-2.4.10-common and kdb-v3.0-2.4.20-i386 into the kernel.
> >Then, I put this  kernel (compiled by gcc-.2.96)  to a SMP machine. set a
> >break point by using bp,
> >after the machine hit the break point, I use bt and cpu commands to check
> >the status. Then I type bc 0 to clear that break point, and go to trying
> >to leave kdb. But I never can go out, it always hit "Oops int3 ". I think
> >it is the problem only happen on SMP machine, because another UP (unit
> >processor) never has this problem.
> >
> >Today, I try v4.0 and other two patches kdb-smphdr-v4.0, same problem
> >happened.
> >
> >Doese someone has some solutions about this.
> 
> Known race condition with no solution yet.  man Documentation/kdb/kdb_bp.man
> and look for 'SMP'.
> 
> 
>