Plese consider adding commit 0231bb5336758426b44ccd798ccd3c5419c95d58 to stable tree. It fixes a real bug, which was explained here: http://thread.gmane.org/gmane.linux.kernel.perf.user/1144 and I've managed to reproduce the bug in 3.4 kernel with the test program attached in the above email, and I've confirmed the bug fix. The effect of the bug is, if we open a group of mixed events(sw/hw) and the "disabled" flag is not set and sw events come first, then some of the perf events won't be started after the call to perf_event_open(). The bug fix should be applicable to kernels >= 3.0 && <= 3.7. -- Li Zefan -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html