linux-kernel - Re: [PATCH] An RCU for SMP with a single CPU garbage collector

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Message-ID: <20110307211613.GA26455@tsunami.ccur.com>
Date:	Mon, 7 Mar 2011 16:16:13 -0500
From:	Joe Korty <joe.korty@...r.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] An RCU for SMP with a single CPU garbage collector

On Mon, Mar 07, 2011 at 04:01:57PM -0500, Paul E. McKenney wrote:
> Interesting!
> 
> But I would really prefer leveraging the existing RCU implementations
> to the extent possible.  Are the user-dedicated CPUs able to invoke
> system calls?  If so, something like Frederic's approach should permit
> the existing RCU implementations to operate normally.  If not, what is
> doing the RCU read-side critical sections on the dedicated CPUs?
> 
>                                                         Thanx, Paul

I haven't seen Frederic's patch.  Sorry I missed it!
It might have saved a bit of work...

I thought about the system call approach but rejected it.
Some (maybe many) customers needing dedicated CPUs will
have apps that never make any system calls at all.

Regards,
Joe
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