Subject: Re: Overview of concurrency managed workqueue
From: Daniel Walker <dwalker@codeaurora.org>
To: Tejun Heo <tj@kernel.org>
Cc: mingo@elte.hu, awalls@radix.net, linux-kernel@vger.kernel.org,
       jeff@garzik.org, akpm@linux-foundation.org, rusty@rustcorp.com.au,
       cl@linux-foundation.org, dhowells@redhat.com, arjan@linux.intel.com,
       johannes@sipsolutions.net, oleg@redhat.com, axboe@kernel.dk
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Date: Wed, 16 Jun 2010 06:41:04 -0700
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On Wed, 2010-06-16 at 15:30 +0200, Tejun Heo wrote:
> On 06/16/2010 03:27 PM, Daniel Walker wrote:
> >> Yes, that is.  With new cmwq, a wq can't assume association with
> >> specific kthread and thus can't use wq as simple frontend to kthreads,
> >> but if somebody wants dedicated kthreads instead of shared ones in
> >> units of work, [s]he should be using kthread.
> > 
> > I'm not talking about coders using workqueues when they should be using
> > kthreads .. We're talking about currently existing workqueues. Aren't
> > you converting all _current_ workqueues to your system?
> 
> Yes, sure I'm but which current users are you talking about?

Any workqueue that has a thread which can be prioritized from userspace.
As long as there is a thread it can usually be given a priority from
userspace, so any _current_ workqueue which uses a single thread or
multiple threads is an example of what I'm talking about.

Daniel

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