linux-kernel - Re: [RFC][PATCH 4/4] Rename lock_cpu_hotplug/unlock_cpu

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Date:	Wed, 30 Aug 2006 08:14:05 -0700
From:	"Paul E. McKenney" <paulmck@...ibm.com>
To:	Paul Jackson <pj@....com>
Cc:	ego@...ibm.com, mingo@...e.hu, nickpiggin@...oo.com.au,
	arjan@...radead.org, rusty@...tcorp.com.au, torvalds@...l.org,
	akpm@...l.org, linux-kernel@...r.kernel.org, arjan@...el.linux.com,
	davej@...hat.com, dipankar@...ibm.com, vatsa@...ibm.com,
	ashok.raj@...el.com
Subject: Re: [RFC][PATCH 4/4] Rename lock_cpu_hotplug/unlock_cpu_hotplug

On Tue, Aug 29, 2006 at 07:38:28PM -0700, Paul Jackson wrote:
> Paul E. McKenney wrote:
> > Let me throw something together...
> 
> I think it's the hotplug folks that were most interested
> in this "unfair rwsem" lock, for lock_cpu_hotplug().

Yep, been chatting with them separately.

> I wouldn't spend any effort on throwing this together
> just for cpusets.  I'm not looking to change cpuset
> locking anytime soon.

Well, my next question was going to be whether cpuset readers really
need to exclude the writers, or whether there can be a transition
period while the mastodon makes the change as long as it avoids stomping
the locusts.  ;-)

							Thanx, Paul
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