Re: [PATCH] printk: git rid of [sched_delayed] message for printk_deferred

From: Peter Zijlstra
Date: Wed Sep 17 2014 - 18:36:46 EST


On Wed, Sep 17, 2014 at 10:22:55AM -0400, Steven Rostedt wrote:
> On Wed, 17 Sep 2014 16:18:16 +0200
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > By not calling console_unlock() the messages will be 'delayed', as in,
> > we'll not call console->write() and we'll not see them, etc..
> >
> > So some form of [delayed] or whatnot seems to remain appropriate.
> >
> > I agree that the 'sched_' part has lived far beyond its relevance.
>
> But then we should add '[delayed]' if a CPU calls printk() while
> another CPU is printing, as printk() wont block in that case either,
> and the output will happen some later time.

You're over thinking this. You cannot (and we don't want to) know if it
indeed got delayed, therefore it got delayed.
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