linux-kernel - Re: Overview of concurrency managed workqueue

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Message-ID: <alpine.DEB.2.00.1006151339510.9635@router.home>
Date:	Tue, 15 Jun 2010 13:40:39 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Tejun Heo <tj@...nel.org>
cc:	mingo@...e.hu, awalls@...ix.net, linux-kernel@...r.kernel.org,
	jeff@...zik.org, akpm@...ux-foundation.org, rusty@...tcorp.com.au,
	dhowells@...hat.com, arjan@...ux.intel.com,
	johannes@...solutions.net, oleg@...hat.com, axboe@...nel.dk
Subject: Re: Overview of concurrency managed workqueue

On Tue, 15 Jun 2010, Tejun Heo wrote:

> == Benefits
>
> * Less to worry about causing deadlocks around execution resources.
>
> * Far fewer number of kthreads.
>
> * More flexibility without runtime overhead.
>
> * As concurrency is no longer a problem, workloads which needed
>   separate mechanisms can now use generic workqueue instead.  This
>   easy access to concurrency also allows stuff which wasn't worth
>   implementing a dedicated mechanism for but still needed flexible
>   concurrency.

Start the whole with the above? Otherwise people get tired of reading
before finding out what the point of the exercise is?

View attachment "perf-wq.c" of type "TEXT/X-CSRC" (6396 bytes)