[ltt-dev] [PATCH] fix the "unknown" case

[Mathieu Desnoyers]

* Paul E. McKenney (paulmck at linux.vnet.ibm.com) wrote:
> On Thu, Jun 10, 2010 at 09:46:31PM -0400, Mathieu Desnoyers wrote:

[...]

(will reply to the rest in the individual patches)

> > Can we trust __sync_lock_test_and_set/__sync_add_and_fetch given that
> > __sync_synchronize is broken ?
> 
> I don't know yet.  If it turns out that we cannot, then I will use some
> form of global locking.  But the __sync_lock_test_and_set() do at least
> generate instructions, unlike __sync_synchronize().  ;-)

I'm concerned about the fact that their synchronization primitives might have
the assembly all with, except for the memory barriers.

Thanks,

Mathieu

> 
> I will send two patches, one that incorporates your suggestions, and
> another that removes sync_core().
> 
> 							Thanx, Paul
> 
> > Thanks,
> > 
> > Mathieu
> > 
> > > +
> > > +#ifdef __cplusplus 
> > > +}
> > > +#endif
> > > +
> > > +#include <urcu/uatomic_generic.h>
> > > +
> > > +#endif /* _URCU_ARCH_UATOMIC_ARMV7_H */
> > 
> > -- 
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant
> > EfficiOS Inc.
> > http://www.efficios.com

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com