On Mon, 18 Dec 2017 15:13:53 +0100 Petr Mladek <pmla...@suse.com> wrote:
> One question is if we really want to rely on offloading in > this case. What if this is printed to debug some stalled > system. Correct, and this is what I call when debugging hard lockups, and I do it from NMI. Which the new NMI code prevents all the data I want to print to come out to console. I had to create a really huge buffer to print it. show_state_filter() is not a normal printk() call. It is used for debugging. Not a very good example of issues that happen on production systems. If anything, this should be disabled on a production system. Let's just add my patch (I'll respin it if it needs it), and send it off into the wild. Let's see if there's still reports of issues, and then come back to solutions. Because, really, I'm still not convinced that there's anything out there that needs much more "fixing" of printk(). -- Steve