Re: [PATCH] workqueue: clear workers of a pool after the CPU isoffline

From: Tejun Heo
Date: Fri Jul 26 2013 - 06:22:52 EST

On Fri, Jul 26, 2013 at 11:47:04AM +0800, Lai Jiangshan wrote:
> any worker can't kill itself.
> managers always tries to leave 2 workers.
> so the workers of the offline cpu pool can't be totally destroyed.

But we *do* want to keep them around as CPUs taken offline are likely
to come online at some point and destroying all of them saves only
~16k of memory while adding more work while CPUs are on/offlined which
can be very frequent on mobile devices. The change was *intentional*.


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