Re: [PATCH 2/3] ring-buffer: make lockless

[Mathieu Desnoyers]

* Steven Rostedt (rostedt@xxxxxxxxxxx) wrote:
> From: Steven Rostedt <srostedt@xxxxxxxxxx>
> 
> This patch converts the ring buffers into a completely lockless
> buffer recording system. The read side still takes locks since
> we still serialize readers. But the writers are the ones that
> must be lockless (those can happen in NMIs).

Hi Steven,

Have you started modeling this scheme with Promela as I previously
discussed with you ? Paul McKenney did a lot of nice papers on the
topic, and given the complexity level of this lockless buffering
algorithm, I'd be much more comfortable if it was formally verified. The
idea here is to make sure we don't start an endless bug-chasing hunt as
trace buffers gets more exposure to various workloads.

Thanks,

Mathieu

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Mathieu Desnoyers
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