linux-kernel - Re: [PATCH] rcu: unify boost and kthread priorities

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Message-ID: <20140917150937.GV4723@linux.vnet.ibm.com>
Date:	Wed, 17 Sep 2014 08:09:37 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Clark Williams <clark.williams@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] rcu: unify boost and kthread priorities

On Wed, Sep 17, 2014 at 08:14:42AM -0500, Clark Williams wrote:
> On Tue, 16 Sep 2014 13:41:56 -0700
> "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > On Mon, Sep 15, 2014 at 10:05:24AM -0500, Clark Williams wrote:
> > > Paul,
> > > 
> > > Here's the result of our conversation Friday, regarding the per-CPU and
> > > boost priorities:
> > > 
> > > Rename CONFIG_RCU_BOOST_PRIO to CONFIG_RCU_KTHREAD_PRIO and use this
> > > value for both the per-CPU kthreads (rcuc/N) and the rcu boosting
> > > threads (rcub/n).
> > > 
> > > Also, create the module_parameter rcutree.kthread_prio to be used on
> > > the kernel command line at boot to set a new value
> > > (rcutree.kthread_prio=N).
> > > 
> > > Signed-off-by: Clark Williams <clark.williams@...il.com>
> > 
> > Thank you, Clark!
> > 
> > I queued this, porting to rcu/dev, which resulted in the following
> > patch.  Please check this to make sure it still reflects your intent.
> > In the meantime, I will start testing.
> > 
> > 							Thanx, Paul
> 
> Yes, looks right (and you fixed that I didn't have it all under
> RCU_BOOST). 

Very good!  Early testing looks good, will let you know how it goes.

							Thanx, Paul

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