On Tue, Oct 07, 2014 at 12:52:49AM +0300, Alexander Shishkin wrote: > Peter Zijlstra <pet...@infradead.org> writes:
> > No, and I think I realized this after sending that email, but at the > > time I figured there was another way to do it. Of course, now that > > several weeks have passed I cannot for the life of me remember what it > > was. > > > > Lemme go over these patches again to refresh my mind and maybe I'll > > remember. > > Yes, ring buffer can keep a refcount for the aux_priv object, which is > grabbed once at mmap and once at perf_aux_output_begin() and released > accordingly and whichever drops the refcount to zero calls > pmu::free_aux. No need to grab page->_count and driver is a bit simpler. Yes, I suppose that'll work just fine. -- 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/
