linux-kernel - Re: Using tracing_off() in __schedule

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Date:	Fri, 12 Mar 2010 22:15:27 -0500
From:	Chase Douglas <chase.douglas@...onical.com>
To:	rostedt@...dmis.org
Cc:	linux-kernel@...r.kernel.org,
	kernel-team <kernel-team@...ts.ubuntu.com>
Subject: Re: Using tracing_off() in __schedule_bug()

On Fri, Mar 12, 2010 at 10:09 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Fri, 2010-03-12 at 21:50 -0500, Chase Douglas wrote:
>> On Fri, Mar 12, 2010 at 9:30 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
>
>> I was thinking that there may be times where you want to skip warnings
>> to trace real bugs. For example, there's a WARNING that you hit if
>> your resume takes too long. I may want to skip that warning for the
>> oops that occurs just after it. As a distro, we also want to be
>> flexible in our official kernels so we don't have to build special
>> ones when people hit bugs. It's not as though it would be very
>> difficult to design with a few priorities, so unless it's really
>> unnecessary I don't see why we shouldn't. The default would also fire
>> tracing_off in all cases, so most people wouldn't have to modify it
>> unless they hit a corner case.
>
> I'm fine with having a two layer. Stop tracing on bugs and/or on
> warnings. I would actually have disable on warnings be default off.
> There are too many kernel warnings that trigger too easily, having your
> resume warning be one of them.
>
> I'm still not sure we need a separate one for critical errors. A oops,
> panic and BUG should all be the same. Since any of them can cause the
> system to halt.

That sounds fine to me. I'll work on a patch for this.

-- Chase
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