Thanks a lot for your help. Seems like the problem is
only in 2.6.32 kernel, 2.6.33 and 2.6.34 ara working
fine. I used git bisect like you suggested and the
problem is on a commit:

    sched: Fix a race between ttwu() and migrate_task()

I e-mailed it to the 2 maintainers working on kernel/sched*
Hope they fix it soon.

--------------------------
Alexandros Papadogiannakis




> Date: Sat, 19 Jun 2010 01:31:48 +0200
> From: samuel.thibault@inria.fr
> To: hwloc-users@open-mpi.org
> Subject: Re: [hwloc-users] FW: Problem with hwloc_set_thread_cpubind() and pthread_barrier_wait() on new debianj
>
> Samuel Thibault, le Sat 19 Jun 2010 01:30:47 +0200, a écrit :
> > Αλέξανδρος Παπαδογιαννάκης, le Sat 19 Jun 2010 02:20:37 +0300, a écrit :
> > > I forgot to ask. Is there a way to get pid_t from a pthread_t?
> >
> > No :/
>
> (but you can use pthread_setaffinity_np)
>
> Samuel
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> hwloc-users@open-mpi.org
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