linux-kernel - Re: [PATCH v4 02/14] mm, tracing: make show_gfp

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Date:	Wed, 3 Feb 2016 15:55:40 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Vlastimil Babka <vbabka@...e.cz>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Minchan Kim <minchan@...nel.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Mel Gorman <mgorman@...e.de>, Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH v4 02/14] mm, tracing: make show_gfp_flags() up to date

On Tue, 26 Jan 2016, Vlastimil Babka wrote:

> The show_gfp_flags() macro provides human-friendly printing of gfp flags in
> tracepoints. However, it is somewhat out of date and missing several flags.
> This patches fills in the missing flags, and distinguishes properly between
> GFP_ATOMIC and __GFP_ATOMIC which were both translated to "GFP_ATOMIC".
> More generally, all __GFP_X flags which were previously printed as GFP_X, are
> now printed as __GFP_X, since ommiting the underscores results in output that
> doesn't actually match the source code, and can only lead to confusion. Where
> both variants are defined equal (e.g. _DMA and _DMA32), the variant without
> underscores are preferred.
> 
> Also add a note in gfp.h so hopefully future changes will be synced better.
> 
> __GFP_MOVABLE is defined twice in include/linux/gfp.h with different comments.
> Leave just the newer one, which was intended to replace the old one.
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Rasmus Villemoes <linux@...musvillemoes.dk>
> Cc: Joonsoo Kim <iamjoonsoo.kim@....com>
> Cc: Minchan Kim <minchan@...nel.org>
> Cc: Sasha Levin <sasha.levin@...cle.com>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
> Cc: Mel Gorman <mgorman@...e.de>
> Reviewed-by: Michal Hocko <mhocko@...e.com>

Acked-by: David Rientjes <rientjes@...gle.com>