From: Tejun Heo <tj@kernel.org>
To: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] workqueue: clear workers of a pool after the CPU is offline
Date: Fri, 26 Jul 2013 06:22:40 -0400 [thread overview]
Message-ID: <20130726102240.GA30786@mtj.dyndns.org> (raw)
In-Reply-To: <51F1F138.2060902@cn.fujitsu.com>
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*.
Thanks.
--
tejun
next prev parent reply other threads:[~2013-07-26 10:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-25 10:52 [PATCH] workqueue: clear workers of a pool after the CPU is offline Lai Jiangshan
2013-07-25 15:31 ` Tejun Heo
2013-07-26 2:13 ` Lai Jiangshan
2013-07-26 3:07 ` Tejun Heo
2013-07-26 3:47 ` Lai Jiangshan
2013-07-26 10:22 ` Tejun Heo [this message]
2013-07-26 16:55 ` Lai Jiangshan
2013-07-26 17:03 ` Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2013-02-20 17:04 Lai Jiangshan
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