On Tue, 9 Oct 2012 13:14:09 +0200, Daniel Vetter <daniel at ffwll.ch> wrote: > One thing I wonder is whether we miss any barrier between the wc > writes to the ringbuffer and the tail update. If that's the case I > wonder where all the bug reports are ... Ditto. I've often wondered how we get away without a wmb() there... > Last one: Which machines blow up when you drop that mb()? pnv, though that's the only non-LLC I've been testing with the incomplete patch so I can't say it is limited to that machine. -Chris -- Chris Wilson, Intel Open Source Technology Centre
