linux-kernel - Re: [PATCH 3/10] mm/memcg: add zone pointer into lruvec

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Date:	Tue, 21 Feb 2012 17:08:07 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Ying Han <yinghan@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/10] mm/memcg: add zone pointer into lruvec

On Mon, 20 Feb 2012 15:30:45 -0800 (PST)
Hugh Dickins <hughd@...gle.com> wrote:

> The lruvec is looking rather useful: if we just add a zone pointer
> into the lruvec, then we can pass the lruvec pointer around and save
> some superfluous arguments and recomputations in various places.
> 
> Just occasionally we do want mem_cgroup_from_lruvec() to get back from
> lruvec to memcg; but then we can remove all uses of vmscan.c's private
> mem_cgroup_zone *mz, passing the lruvec pointer instead.
> 
> And while we're there, get_scan_count() can call vmscan_swappiness()
> once, instead of twice in a row.
> 
> Signed-off-by: Hugh Dickins <hughd@...gle.com>
> ---

I like this cleanup

Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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