> I don't think this method works for interrupt threshold > 1 case. When > collision > happens, the hardware only create one PEBS record. The status in next record > has > nothing to do with the collision record. > Not even for the threshold == 1 case, because the same could happen with a different PEBS event. Of course in any case it's very unlikely ...
> > > So typically we'd have one event set and no problem, but in case there's > > more we can reconstruct with such a backwards pass from a known good > > state. > > > > But when in doubt, we should drop the record, its the safest choice. > > The problem is that, in some cases, each PEBS record has more than one events > set, so we will drop all records. Just dropping is fine imho, this should be rare. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
