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From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] dst: call cond_resched() in dst_gc_task()
Date: Mon, 8 Feb 2010 23:31:15 -0800
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Cc: Stephen Hemminger <shemminger@vyatta.com>,
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To: Eric Dumazet <eric.dumazet@gmail.com>
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On Tue, 09 Feb 2010 08:20:36 +0100 Eric Dumazet <eric.dumazet@gmail.com> wrote:

> I suppose offlining a cpu migrates its works to another (online) cpu ?

Sort of, effectively.  The workqueue code runs all the pending works on
the to-be-offlined CPU and then it's done.

schedule_delayed_work() starts out with a timer, and the timer code
_does_ perform migration off the going-away CPU.