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Re: [PATCH 34/35] async: use workqueue for worker pool

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From: Arjan van de Ven
Subject: Re: [PATCH 34/35] async: use workqueue for worker pool
Date: Tuesday, June 29, 2010 - 11:41 am

On 6/29/2010 11:34 AM, Tejun Heo wrote:

depends on the user.

For "throw over the wall" work, this is unclear.
Especially in the light of hyperthreading (sharing L1 cache) or even 
modern cpus (where many cores share a fast L3 cache).

I'm fine with a solution that has the caller say 'run anywhere' vs 'try 
to run local'.
I suspect there will be many many cases of 'run anywhere'.isn't hard at 
all. I just wanna know whether it's something which is


I think it's useful for all users of your worker pool, not (just) async.

it's a severe limitation of the current linux infrastructure, and your 
infrastructure has the chance to fix this...

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Messages in current thread:
[PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Mon Jun 28, 2:04 pm)
Re: [PATCH 34/35] async: use workqueue for worker pool, Frederic Weisbecker, (Mon Jun 28, 3:55 pm)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 12:25 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Frederic Weisbecker, (Tue Jun 29, 5:18 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 8:46 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Frederic Weisbecker, (Tue Jun 29, 8:52 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 8:55 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Arjan van de Ven, (Tue Jun 29, 9:40 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 9:59 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 10:12 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Arjan van de Ven, (Tue Jun 29, 11:07 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Arjan van de Ven, (Tue Jun 29, 11:08 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 11:15 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Arjan van de Ven, (Tue Jun 29, 11:22 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 11:34 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Arjan van de Ven, (Tue Jun 29, 11:41 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, Tejun Heo, (Tue Jun 29, 11:59 am)
Re: [PATCH 34/35] async: use workqueue for worker pool, David Howells, (Tue Jun 29, 2:37 pm)
[PATCHSET] workqueue: implement and use WQ_UNBOUND, Tejun Heo, (Fri Jul 2, 2:17 am)
[PATCH 1/4] workqueue: prepare for WQ_UNBOUND implementation, Tejun Heo, (Fri Jul 2, 2:19 am)
[PATCH 2/4] workqueue: implement unbound workqueue, Tejun Heo, (Fri Jul 2, 2:20 am)
[PATCH 3/4] workqueue: remove WQ_SINGLE_CPU and use WQ_UNB ..., Tejun Heo, (Fri Jul 2, 2:24 am)
[PATCH 4/4] async: use workqueue for worker pool, Tejun Heo, (Fri Jul 2, 2:25 am)
[PATCH 2/4] workqueue: implement unbound workqueue, Tejun Heo, (Fri Jul 2, 2:28 am)
Re: [PATCHSET] workqueue: implement and use WQ_UNBOUND, Tejun Heo, (Fri Jul 2, 2:32 am)
Re: [PATCH 4/4] async: use workqueue for worker pool, Stefan Richter, (Fri Jul 2, 8:09 am)
[PATCH UPDATED 4/4] async: use workqueue for worker pool, Tejun Heo, (Fri Jul 2, 9:25 am)
Re: [PATCH 4/4] async: use workqueue for worker pool, Tejun Heo, (Fri Jul 2, 9:26 am)
Re: [PATCHSET] workqueue: implement and use WQ_UNBOUND, Tejun Heo, (Tue Jul 6, 10:41 pm)
Re: [PATCHSET] workqueue: implement and use WQ_UNBOUND, Tejun Heo, (Wed Jul 14, 2:39 am)
Re: [PATCHSET] workqueue: implement and use WQ_UNBOUND, David Howells, (Tue Jul 20, 3:01 pm)