linux-kernel - Re: [patch 3/7] softirq: avoid softirq_work_list for SCHED

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Date:	Thu, 20 May 2010 10:12:39 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...ux.jf.intel.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
	ego@...ibm.com, LKML <linux-kernel@...r.kernel.org>,
	Dominik Brodowski <linux@...inikbrodowski.net>,
	Nigel Cunningham <ncunningham@...a.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [patch 3/7] softirq: avoid softirq_work_list for SCHED_SOFTIRQ
 when sent remotely

On Mon, 2010-05-17 at 11:27 -0700, Suresh Siddha wrote:
> plain text document attachment
> (fix_local_trigger_remote_softirq_for_sched.patch)
> There is no need to add the SCHED_SOFTIRQ work to the softirq_work_list
> when sent remotely. This is because any pending work associated with
> SCHED_SOFTIRQ need not be migrated to a new cpu when the current cpu is
> going down etc.
> 
> Also I am not sure how this softirq_work_list works for other softirqs.
> I don't see anyone removing the list entries from the softirq_work_list
> after it is handled on a remote cpu.

Most odd all that, Dave, Jens, what happened to all that remote_softirq
stuff?
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