linux-kernel - Re: [RFC][PATCH 1/2] Show quicklist at meminfo

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Message-ID: <2f11576a0808210036icd9b61eue58049f15381bcc8@mail.gmail.com>
Date:	Thu, 21 Aug 2008 16:36:00 +0900
From:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cl@...ux-foundation.org, tokunaga.keiich@...fujitsu.com
Subject: Re: [RFC][PATCH 1/2] Show quicklist at meminfo

> quicklist_total_size() is racy against cpu hotplug.  That's OK for
> /proc/meminfo purposes (occasional transient inaccuracy?), but will it
> crash?  Not in the current implementation of per_cpu() afaict, but it
> might crash if we ever teach cpu hotunplug to free up the percpu
> resources.

First, Quicklist doesn't concern to cpu hotplug at all.
it is another quicklist problem.

Next, I think it doesn't cause crash. but I haven't any test.
So, I'll test cpu hotplug/unplug testing today.

I'll report result tommorow.

> I see no cpu hotplug handling in the quicklist code.  Do we leak all
> the hot-unplugged CPU's pages?

Yes.


Thanks!
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