linux-kernel - Re: [PATCH v4 03/11] mm/hugetlb: unify migration callbacks

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Date:   Tue, 7 Jul 2020 13:05:31 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     js1304@...il.com, Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-team@....com, Christoph Hellwig <hch@...radead.org>,
        Roman Gushchin <guro@...com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Michal Hocko <mhocko@...e.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH v4 03/11] mm/hugetlb: unify migration callbacks

On 7/7/20 9:44 AM, js1304@...il.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@....com>
> 
> There is no difference between two migration callback functions,
> alloc_huge_page_node() and alloc_huge_page_nodemask(), except
> __GFP_THISNODE handling. It's redundant to have two almost similar
> functions in order to handle this flag. So, this patch tries to
> remove one by introducing a new argument, gfp_mask, to
> alloc_huge_page_nodemask().
> 
> After introducing gfp_mask argument, it's caller's job to provide correct
> gfp_mask. So, every callsites for alloc_huge_page_nodemask() are changed
> to provide gfp_mask.
> 
> Note that it's safe to remove a node id check in alloc_huge_page_node()
> since there is no caller passing NUMA_NO_NODE as a node id.
> 
> Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

Yeah, this version looks very good :)
Reviewed-by: Vlastimil Babka <vbabka@...e.cz>

Thanks!