Re: pthreads+bproc (was Re: [BProc] Re: bpslave dies)

[Nicholas H. <he...@se...>]

On Wed, 9 Apr 2003 16:04:19 -0600
er...@he... wrote:
> 
> Hrm....  The only plausible reason I can think of for the kill -9 to
> not work is that it's actually blocked in kernel space somewhere.  It
> could be that the process is getting signaled while it's waiting for
> some remote request to complete.  Most likely in a bpr_rsyscall.  I
> think a message trace for all the pids involved would be very
> interesting here.  If that's the case we need to figure out what that
> remote request is and (of course) why it's not completing in a
> reasonable amount of time.

Sure will do.

> 
> I suspect there's a problem in the signal forwarding and the remote
> system call stuff that the slave side does.  That code *looks* ok to
> me but maybe there's a problem.  Seeing a message trace for the PIDs
> involved should shed some light on this.
> 
> Also, process 5377 reparenting to bpslave is normal.  bpslave is the
> "child reaper" (instead of init) for bproc managed processes on the
> nodes.  This is necessary for ptrace to work properly.  I think the
> parents exited and it didn't so that reparent is correct.

Ok -- I just thought it weird that it reparented, but didn't die from kill -9.

I will get those message traces to you as soon as I can ( most likely in the morning ).

Thanks a ton Erik :)

Nic
-- 
Nicholas Henke
Linux Cluster Systems Programmer
Liniac Project - Univ. of Pennsylvania