linux-kernel - Re: [PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of zone_idx(preferred

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Message-ID: <20160223180436.GA13816@cmpxchg.org>
Date:	Tue, 23 Feb 2016 10:04:36 -0800
From:	Johannes Weiner <hannes@...xchg.org>
To:	Mel Gorman <mgorman@...hsingularity.net>
Cc:	Linux-MM <linux-mm@...ck.org>, Rik van Riel <riel@...riel.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/27] mm, page_alloc: Use ac->classzone_idx instead of
 zone_idx(preferred_zone)

On Tue, Feb 23, 2016 at 03:04:24PM +0000, Mel Gorman wrote:
> ac->classzone_idx is determined by the index of the preferred zone and cached
> to avoid repeated calculations. wake_all_kswapds() should use it instead of
> using zone_idx() within a loop.
> 
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

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