linux-kernel - Re: [PATCH 1/4] s390: get rid of superfluous __GFP

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Message-Id: <20170308082340.GB12158@osiris>
Date:   Wed, 8 Mar 2017 09:23:40 +0100
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-mm@...ck.org, Vlastimil Babka <vbabka@...e.cz>,
        Johannes Weiner <hannes@...xchg.org>,
        Mel Gorman <mgorman@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 1/4] s390: get rid of superfluous __GFP_REPEAT

On Tue, Mar 07, 2017 at 04:48:40PM +0100, Michal Hocko wrote:
> From: Michal Hocko <mhocko@...e.com>
> 
> __GFP_REPEAT has a rather weak semantic but since it has been introduced
> around 2.6.12 it has been ignored for low order allocations.
> 
> page_table_alloc then uses the flag for a single page allocation. This
> means that this flag has never been actually useful here because it has
> always been used only for PAGE_ALLOC_COSTLY requests.
> 
> An earlier attempt to remove the flag 10d58bf297e2 ("s390: get rid of
> superfluous __GFP_REPEAT") has missed this one but the situation is very
> same here.
> 
> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
> Signed-off-by: Michal Hocko <mhocko@...e.com>
> ---
>  arch/s390/mm/pgalloc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

FWIW:
Acked-by: Heiko Carstens <heiko.carstens@...ibm.com>

If you want, this can be routed via the s390 tree, whatever you prefer.