Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue with per-vhost kthread

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From: Michael S. Tsirkin

Subject: Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue with per-vhost kthread

Date: Monday, July 26, 2010 - 8:51 am

On Mon, Jul 26, 2010 at 05:46:30PM +0200, Tejun Heo wrote:
quoted text> On 07/26/2010 05:34 PM, Tejun Heo wrote:
> > Hello,
> > 
> > On 07/26/2010 05:25 PM, Michael S. Tsirkin wrote:
> >> BTW, kthread_worker would benefit from the optimization I implemented
> >> here as well.
> > 
> > Hmmm... I'm not quite sure whether it's an optimization.  I thought
> > the patch was due to feeling uncomfortable about using barriers?  Is
> > it an optimization?
> 
> Yeah, one less smp_mb() in execution path.  The lock dancing in
> flush() is ugly but then again mucking with barriers could be harder
> to understand.  Care to send a patch against wq#for-next tree?
> 
> Thanks.

Sure. Where's that, exactly?

quoted text> -- 
> tejun
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Messages in current thread:

[PATCH 2/3] workqueue: Add an API to create a singlethread ..., Sridhar Samudrala, (Tue May 18, 5:04 pm)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Thu May 27, 2:14 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Oleg Nesterov, (Thu May 27, 5:44 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Thu May 27, 6:12 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Tejun Heo, (Thu May 27, 9:15 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Sridhar Samudrala, (Thu May 27, 9:24 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Thu May 27, 9:41 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Tejun Heo, (Thu May 27, 9:56 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Oleg Nesterov, (Thu May 27, 10:30 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Thu May 27, 10:32 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Tejun Heo, (Thu May 27, 2:20 pm)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Fri May 28, 8:08 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Tejun Heo, (Fri May 28, 8:54 am)

Re: [PATCH 2/3] workqueue: Add an API to create a singleth ..., Michael S. Tsirkin, (Sun May 30, 4:29 am)

[PATCH 3/3] vhost: apply cpumask and cgroup to vhost pollers, Tejun Heo, (Sun May 30, 1:25 pm)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost p ..., Li Zefan, (Sun May 30, 6:11 pm)

[PATCH UPDATED 3/3] vhost: apply cpumask and cgroup to vho ..., Tejun Heo, (Sun May 30, 11:58 pm)

Re: [PATCH 2/3] cgroups: Add an API to attach a task to cu ..., Tejun Heo, (Mon May 31, 12:00 am)

Re: [PATCH UPDATED 3/3] vhost: apply cpumask and cgroup to ..., Li Zefan, (Mon May 31, 12:48 am)

Re: [PATCH UPDATED2 3/3] vhost: apply cpumask and cgroup t ..., Tejun Heo, (Mon May 31, 3:20 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Oleg Nesterov, (Mon May 31, 7:39 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Tejun Heo, (Mon May 31, 8:07 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Michael S. Tsirkin, (Mon May 31, 8:22 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Oleg Nesterov, (Mon May 31, 8:31 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Tejun Heo, (Mon May 31, 8:38 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Tejun Heo, (Mon May 31, 8:45 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Michael S. Tsirkin, (Mon May 31, 9:00 am)

[PATCH 3/3] vhost: apply cpumask and cgroup to vhost workers, Tejun Heo, (Tue Jun 1, 2:35 am)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost w ..., Michael S. Tsirkin, (Tue Jun 1, 3:17 am)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost w ..., Tejun Heo, (Tue Jun 1, 3:56 am)

Re: [PATCH 1/3] vhost: replace vhost_workqueue with per-vh ..., Paul E. McKenney, (Tue Jun 1, 7:13 am)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost w ..., Sridhar Samudrala, (Tue Jun 1, 10:19 am)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost w ..., Tejun Heo, (Tue Jun 1, 4:59 pm)

[PATCH UPDATED 1/3] vhost: replace vhost_workqueue with pe ..., Tejun Heo, (Wed Jun 2, 11:40 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Sridhar Samudrala, (Wed Jun 2, 2:34 pm)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost p ..., Michael S. Tsirkin, (Thu Jun 24, 1:11 am)

Re: [PATCH 3/3] vhost: apply cpumask and cgroup to vhost p ..., Sridhar Samudrala, (Thu Jun 24, 3:45 pm)

[PATCH] sched: export sched_set/getaffinity (was Re: [PATC ..., Michael S. Tsirkin, (Fri Jun 25, 3:10 am)

[PATCH repost] sched: export sched_set/getaffinity to modules, Michael S. Tsirkin, (Thu Jul 1, 4:07 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 4:19 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 4:43 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Thu Jul 1, 4:55 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Thu Jul 1, 5:23 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 5:32 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 5:34 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 5:46 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Thu Jul 1, 5:50 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 6:07 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Thu Jul 1, 6:08 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Thu Jul 1, 6:22 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 6:57 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Tejun Heo, (Thu Jul 1, 7:27 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Thu Jul 1, 7:33 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Thu Jul 1, 7:46 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Thu Jul 1, 7:55 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Sridhar Samudrala, (Fri Jul 2, 11:01 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Fri Jul 2, 11:11 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Fri Jul 2, 2:06 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Sun Jul 4, 2:00 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Sridhar Samudrala, (Mon Jul 12, 11:59 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Tue Jul 13, 4:09 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Sridhar Samudrala, (Wed Jul 14, 4:26 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Wed Jul 14, 5:05 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Thu Jul 22, 8:58 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Thu Jul 22, 2:21 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Sat Jul 24, 12:14 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Sun Jul 25, 12:41 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Sun Jul 25, 3:04 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 8:25 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 8:34 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 8:46 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 8:50 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 8:51 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 9:05 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 9:14 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 9:23 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 9:31 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 9:51 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 9:57 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Mon Jul 26, 10:12 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Sridhar Samudrala, (Mon Jul 26, 10:51 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Mon Jul 26, 11:08 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 11:51 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 12:04 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 12:14 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Mon Jul 26, 12:31 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Mon Jul 26, 12:55 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 12:57 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 12:59 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Mon Jul 26, 1:19 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Mon Jul 26, 1:27 pm)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Mon Jul 26, 9:55 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Tue Jul 27, 1:18 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Tue Jul 27, 1:21 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Tue Jul 27, 8:41 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Tue Jul 27, 12:19 pm)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Wed Jul 28, 12:48 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Michael S. Tsirkin, (Wed Jul 28, 3:48 am)

Re: [PATCH UPDATED 1/3] vhost: replace vhost_workqueue wit ..., Tejun Heo, (Wed Jul 28, 5:00 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Fri Jul 30, 7:19 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Tejun Heo, (Fri Jul 30, 7:31 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Michael S. Tsirkin, (Sun Aug 1, 1:50 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Oleg Nesterov, (Mon Aug 2, 8:02 am)

Re: [PATCH repost] sched: export sched_set/getaffinity to ..., Peter Zijlstra, (Wed Aug 4, 3:45 am)

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