[Bug runtime/5194] IO problem on begin/end probes; need

["fche at redhat dot com" <sourceware-bugzilla@sourceware.org>]

------- Additional Comments From fche at redhat dot com  2008-01-21 18:12 -------
(In reply to comment #6)
> (In reply to comment #5)
> > I'm not clear about whether there actually exists a bug described
> > in comment #0, in that we do not enable sleeping or preemption
> > during begin/end probes, so we can't switch CPUs.
> 
> We don't?  News to me. It's easy to test.
> [...]
> in_interrupt:0, irqs_disabled:0, preempt_count:0

Thanks for running the test.
The preempt_count should not be 0.
The generated code in enter_begin_probe clearly contains
a preempt_disable(), so the question is why this does not
appear to have effect.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|IO problem on begin/end     |IO problem on begin/end
                   |probes                      |probes; need


http://sourceware.org/bugzilla/show_bug.cgi?id=5194

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