On (02/01/17 16:39), Petr Mladek wrote: [..] > I guess that you are talking about the introduction of > #define SCHED_WARN_ON(x) WARN_ONCE(x, #x)
my guess would be that Jan was talking about printk_deferred() patch. it's on my TODO list. I want to entirely remove console_sem and scheduler out of printk() path. that's the only way to make printk() deadlock safe. -ss