linux-kernel - Re: [PATCH 06/12] mm, page_alloc: Use masks and shifts when converting GFP flags to migrate types

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Message-ID: <55DC7D60.1060307@suse.cz>
Date:	Tue, 25 Aug 2015 16:36:16 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Mel Gorman <mgorman@...hsingularity.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>,
	Rik van Riel <riel@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...nel.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/12] mm, page_alloc: Use masks and shifts when
 converting GFP flags to migrate types

On 08/24/2015 02:09 PM, Mel Gorman wrote:
> This patch redefines which GFP bits are used for specifying mobility and
> the order of the migrate types. Once redefined it's possible to convert
> GFP flags to a migrate type with a simple mask and shift. The only downside
> is that readers of OOM kill messages and allocation failures may have been
> used to the existing values but scripts/gfp-translate will help.

Yeah after patches 7 and 8, this is not much of a concern :)

> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

Acked-by: Vlastimil Babka <vbabka@...e.cz>

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