linux-kernel - Re: [PATCH -mm 0/6] rcu: introduce kfree

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Date:	Tue, 3 Mar 2009 15:09:55 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Manfred Spraul <manfred@...orfullife.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm 0/6] rcu: introduce kfree_rcu V2


* Lai Jiangshan <laijs@...fujitsu.com> wrote:

> 
> There are 23 instances where the rcu callback just does
> 
> 	kfree(containerof(head,struct whatever_struct,rcu_member));
> 
> The 23 instances exist because there are 23 'struct 
> whatever_struct' with their individual rcu_member. These 
> patches creates a generic kfree_rcu() function that removes 
> the need for these 23 helpers.

Nice idea. The patches dont actually remove the RCU helpers 
anywhere. Might be useful to include a few example conversions 
of this facility as well, so that the total impact can be seen.

	Ingo
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