Re: [GIT PULL] printk: Support for full dynticks mode

From: Frederic Weisbecker
Date: Mon Feb 04 2013 - 22:19:17 EST


2013/2/5 Steven Rostedt <rostedt@xxxxxxxxxxx>:
> On Mon, 2013-02-04 at 18:09 -0800, Andrew Morton wrote:
>
>> Maybe there were other deadlock scenarios, dunno. That knowledge
>> appears to be disappearing into the mists of time :(
>
> Discussing this on IRC with Frederic, he brought up that the
> up(&console_sem) can do a wake_up as well. I guess that's the issue we
> have :-/

Also if we delay the wakeup on klogd but not on the console_sem
waiters, it looks like a general printk() problem. Not something that
only printk_sched() would like to avoid.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/