linux-kernel - Re: [patch] mm, memcg: sync allocation and memcg charge gfp flags for thp fix fix

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Message-ID: <551E516D.4050803@suse.cz>
Date:	Fri, 03 Apr 2015 10:38:05 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] mm, memcg: sync allocation and memcg charge gfp flags
 for thp fix fix

On 04/03/2015 03:41 AM, David Rientjes wrote:
> "mm, memcg: sync allocation and memcg charge gfp flags for THP" in -mm
> introduces a formal to pass the gfp mask for khugepaged's hugepage
> allocation.  This is just too ugly to live.
>
> alloc_hugepage_gfpmask() cannot differ between NUMA and UMA configs by
> anything in GFP_RECLAIM_MASK, which is the only thing that matters for
> memcg reclaim, so just determine the gfp flags once in
> collapse_huge_page() and avoid the complexity.
>
> Signed-off-by: David Rientjes <rientjes@...gle.com>

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

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