Peter Zijlstra <pet...@infradead.org> writes: > On Tue, Sep 09, 2014 at 02:53:42PM +0300, Alexander Shishkin wrote: > >> We can infer where the new data starts from the timestamps in the trace >> stream, so the decoder can take care of it (and that's how it's done at >> the moment). > > So that means the data stream can be read from arbitrary locations, > right? I can imagine not all data streams are always readable like that > (for instance the perf datastream is not). > > Does it make sense to have the driver provide head,tail for this mode? > In your case you can simply provide whatever, but for those where it > matters they can ensure consistent data such that the stream might be > recoverable.
Yes, there's no reason not to, and some HW might indeed benefit from this. Regards, -- Alex -- 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/
