Re: [RFC][PATCH 0/2] preempt: Track unmatched preempt_enable() topreempt_disable()

[Steven Rostedt]

On Thu, 16 Jan 2014 12:18:24 -0500
Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> 
> Back in the original real-time patch there was a nice debug feature
> that tracked where preemption was disabled and not matched by a preempt
> enable. This information made debugging scheduling while atomic much
> easier, especially when a function was buried in a function chain
> that happened just before the schedule. For example:
> 

> Although this bug does not happen often, this feature is extremely helpful
> when it does. I decided to take Ingo's code, which was just written for
> debugging the -rt patch, and clean it up for something that is suitable
> for mainline.
> 

Hmm, I rewrote this prologue a few times, and even though patch 2 states
this, I want to make it clear that the original feature, that this is
based on, was written by Ingo Molnar. I had it clear in my original
version of the prologue, but somehow it was deleted.

-- Steve
--
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/