linux-kernel - Re: [RFC PATCH 1/6] Convert the RCU tasklet into a softirq

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Date:	Fri, 22 Jun 2007 08:10:39 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Hellwig <hch@...radead.org>,
	john stultz <johnstul@...ibm.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>, matthew.wilcox@...com,
	kuznet@....inr.ac.ru
Subject: Re: [RFC PATCH 1/6] Convert the RCU tasklet into a softirq

On Fri, Jun 22, 2007 at 12:00:15AM -0400, Steven Rostedt wrote:
> I believe this was originally done by Dipankar Sarma. I pulled these
> changes from the -rt kernel.
> 
> For better preformance, RCU should use a softirq instead of a
> tasklet.

I was under the imporession we had merged this a while ago due to
tasklet bottlenecks on big machines.  Any reason why it has been delayed
so long?
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