Re: [PATCH] watchdog: Make sure the watchdog thread gets CPU onloaded system

[Peter Zijlstra]

On Thu, 2012-03-15 at 08:39 -0700, Mandeep Singh Baines wrote:
> Its a good tool for catching problems of scale. As we move to more and
> more cores you'll uncover bugs where data structures start to blow up.
> Hash tables get huge, when you have 100000s of processes or millions
> of
> TCP flows, or cgroups or namespace. That critical section (spinlock,
> spinlock_bh, or preempt_disable) that used to be OK might no longer
> be.

Or you run with the preempt latency tracer.
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