linux-kernel - Re: [PATCH v5 2/2] mm/sparse.c: allocate memmap preferring the given node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAM9Jb+hHpeHL5OQfJ4FLT6FnWboegG0f-d7o7FEoD21APnQX3Q@mail.gmail.com>
Date:   Mon, 16 Mar 2020 17:28:21 +0100
From:   Pankaj Gupta <pankaj.gupta.linux@...il.com>
To:     Baoquan He <bhe@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org, mhocko@...e.com,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>, willy@...radead.org,
        richard.weiyang@...il.com, Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH v5 2/2] mm/sparse.c: allocate memmap preferring the given node

> When allocating memmap for hot added memory with the classic sparse, the
> specified 'nid' is ignored in populate_section_memmap().
>
> While in allocating memmap for the classic sparse during boot, the node
> given by 'nid' is preferred. And VMEMMAP prefers the node of 'nid' in
> both boot stage and memory hot adding. So seems no reason to not respect
> the node of 'nid' for the classic sparse when hot adding memory.
>
> Use kvmalloc_node instead to use the passed in 'nid'.
>
> Signed-off-by: Baoquan He <bhe@...hat.com>
> Acked-by: Michal Hocko <mhocko@...e.com>
> Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
> ---
>  mm/sparse.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/sparse.c b/mm/sparse.c
> index 3fa407d7f70a..31dcdfb55c72 100644
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -719,8 +719,8 @@ static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages)
>  struct page * __meminit populate_section_memmap(unsigned long pfn,
>                 unsigned long nr_pages, int nid, struct vmem_altmap *altmap)
>  {
> -       return kvmalloc(array_size(sizeof(struct page),
> -                                  PAGES_PER_SECTION), GFP_KERNEL);
> +       return kvmalloc_node(array_size(sizeof(struct page),
> +                                       PAGES_PER_SECTION), GFP_KERNEL, nid);
>  }
>
>  static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages,
> --

Acked-by: Pankaj Gupta <pankaj.gupta.linux@...il.com>

> 2.17.2
>
>