Em Wed, Oct 19, 2016 at 12:01:26PM +0200, Peter Zijlstra escreveu: > On Tue, Oct 18, 2016 at 05:15:01PM -0400, Daniel Micay wrote: > > It's also worth noting that fine-grained control via a scoped mechanism > > would likely only be used to implement *more restrictions* on Android, > > not to make the feature less aggressive. > > It's desirable for perf events to be disabled by default for non-root > > across the board on Android. > Right, but this is Android. The knob seems to now also live in Debian > (and derived) distros. And there it is utter crap. > It completely defeats having perf for a fairly large segment of > corporate developers who do not get to have root on their own machines > (which is stupid policy but whatever). > It similarly defeats development of self profiling JITs and whatnot. > A capability would allow people to run perf (or another sanctioned > binary), even though in general they cannot do sys_perf_event_open(). But self profiling JITs would be useful for non-developers, on Android (anywhere, really), and for that it would require being able to at least, well, self profile, using sys_perf_event_open() by a normal process, limited to profiling itself, no? This not being possible, self profiling will use some other means, its like sys_perf_event_open() never existed for them. - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
