linux-kernel - Re: [PATCH] v4 RCU: the bloatwatch edition

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Message-ID: <20090506120909.GR25203@elte.hu>
Date:	Wed, 6 May 2009 14:09:09 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	David Howells <dhowells@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	paulmck@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	niv@...ibm.com, dvhltc@...ibm.com, lethal@...ux-sh.org,
	kernel@...tstofly.org, matthew@....cx
Subject: Re: [PATCH] v4 RCU: the bloatwatch edition


* David Howells <dhowells@...hat.com> wrote:

> Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > This patch is a version of RCU designed for (!SMP && EMBEDDED)
> > provided as a proof of concept of a small-footprint RCU implementation.
> > In particular, the implementation of synchronize_rcu() is extremely
> > lightweight and high performance.  It passes rcutorture testing in each
> > of the four relevant configurations (combinations of NO_HZ and PREEMPT)
> > on x86.  This saves about 900 bytes compared to Classic RCU, and a
> > couple kilobytes compared to Hierarchical RCU (updated to 2.6.29):
> > ...
> > Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> 
> Acked-by: David Howells <dhowells@...hat.com>

i'm wondering what Andrew thinks - he had objections, right?

	Ingo
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