linux-kernel - Re: Overview of concurrency managed workqueue

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Date:	Sat, 19 Jun 2010 14:20:10 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Andy Walls <awalls@...metrocast.net>,
	Daniel Walker <dwalker@...eaurora.org>, mingo@...e.hu,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	akpm@...ux-foundation.org, rusty@...tcorp.com.au,
	cl@...ux-foundation.org, dhowells@...hat.com,
	arjan@...ux.intel.com, johannes@...solutions.net, oleg@...hat.com,
	axboe@...nel.dk
Subject: Re: Overview of concurrency managed workqueue

> * Do machines ever report that many MCE errors?  The usual rate seems
>   like one per weeks or months even when they're frequent.

Yes you can even get a flood when the system or parts 
of the system is dying. There's some throttling in the error handling, 
but yes in some cases you can get high rates.

> * If a machine is actually reporting enough errors to overwhelm single
>   error handling thread, does it even matter what we do?

There are cases where you can have many errors but still survive.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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