On Fri, 17 Apr 2015, Andy Lutomirski wrote: > On 04/16/2015 11:20 AM, Vince Weaver wrote: > > Probably a better change would have been to add "2" to mean per-process > > and make that the default setting. Probably too late to fix that now. > > Good point. I wish you'd thought of that sooner :( Well it's been a busy semester and so I've had less time than normal to play perf_event ABI police. I also was surprised this particular patch managed to get into 4.0 so quickly; I thought it was going to be a 4.1 change when I added it to my "changesets to look at more closely" list. In any case most people won't notice this change. It will be a minor inconvenience for HPC people doing complicated homebrew self monitoring (especially if RHEL backports the patch and then suddenly things break and a simple "well are you running 4.0 or newer" is meaningless). Using the value in /sys/devices/cpu/rdpmc to help debug the problem wouldn't have worked anyway because it looks like non-root can't do that. Vince -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
