> The PER control registers only get reloaded on task switch. Can you test > if this patch fixes your problem? Long ago when I first worked with David Wilder on s390 arch code, I remember we made this change. It seems to have been forgotten in the later rounds of reworking and merging. Thanks, Roland -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html