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Date: Mon, 18 Jul 2016 12:11:28 -0400
From: Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: [PATCH 1/3] mm, vmscan: Remove redundant check in shrink_zones()
Message-ID: <20160718161128.GA16465@cmpxchg.org>
References: <1468853426-12858-1-git-send-email-mgorman@techsingularity.net>
 <1468853426-12858-2-git-send-email-mgorman@techsingularity.net>
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In-Reply-To: <1468853426-12858-2-git-send-email-mgorman@techsingularity.net>
Sender: owner-linux-mm@kvack.org
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To: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrew Morton <akpm@linux-foundation.org>, Minchan Kim <minchan@kernel.org>, Vlastimil Babka <vbabka@suse.cz>, Linux-MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>

On Mon, Jul 18, 2016 at 03:50:24PM +0100, Mel Gorman wrote:
> As pointed out by Minchan Kim, shrink_zones() checks for populated
> zones in a zonelist but a zonelist can never contain unpopulated
> zones. While it's not related to the node-lru series, it can be
> cleaned up now.
> 
> Suggested-by: Minchan Kim <minchan@kernel.org>
> Signed-off-by: Mel Gorman <mgorman@techsingularity.net>

Ha, I didn't know that. But yeah, the zonelist building code excludes
unpopulated zones from the start. Neat.

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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