From: David Hildenbrand <david@redhat.com>
To: Wei Yang <richardw.yang@linux.intel.com>, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
mhocko@suse.com, yang.shi@linux.alibaba.com, rientjes@google.com
Subject: Re: [Patch v2 2/4] mm/migrate.c: wrap do_move_pages_to_node() and store_status()
Date: Tue, 28 Jan 2020 11:14:55 +0100 [thread overview]
Message-ID: <15777c05-2f2c-b818-dacd-3ec31f83be8d@redhat.com> (raw)
In-Reply-To: <20200122011647.13636-3-richardw.yang@linux.intel.com>
On 22.01.20 02:16, Wei Yang wrote:
> Usually do_move_pages_to_node() and store_status() is a pair. There are
> three places call this pair of functions with almost the same form.
I'd suggest
"
Usually, do_move_pages_to_node() and store_status() are used in
combination. We have three similar call sites.
Let's provide a wrapper for both function calls -
move_pages_and_store_status - to make the calling code easier to
maintain and fix (as noted by Yang Shi, the return value handling of
do_move_pages_to_node() has a flaw).
"
>
> This patch just wrap it to make it friendly to audience and also
> consolidate the move and store action into one place. Also mentioned by
> Yang Shi, the handling of do_move_pages_to_node()'s return value is not
> proper. Now we can fix it in one place.
>
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
> Acked-by: Michal Hocko <mhocko@suse.com>
> ---
> mm/migrate.c | 30 +++++++++++++++++++-----------
> 1 file changed, 19 insertions(+), 11 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 4c2a21856717..a4d3bd6475e1 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -1583,6 +1583,19 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
> return err;
> }
>
> +static int move_pages_and_store_status(struct mm_struct *mm, int node,
> + struct list_head *pagelist, int __user *status,
> + int start, int nr)
nit: indentation
> +{
> + int err;
> +
> + err = do_move_pages_to_node(mm, pagelist, node);
> + if (err)
> + return err;
> + err = store_status(status, start, node, nr);
> + return err;
return store_status(status, start, node, nr);
directly
Apart from that (and some more indentation nits)
Reviewed-by: David Hildenbrand <david@redhat.com>
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-01-28 10:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 1:16 [Patch v2 0/4] cleanup on do_pages_move() Wei Yang
2020-01-22 1:16 ` [Patch v2 1/4] mm/migrate.c: not necessary to check start and i Wei Yang
2020-01-28 10:04 ` David Hildenbrand
2020-01-29 0:32 ` Wei Yang
2020-01-22 1:16 ` [Patch v2 2/4] mm/migrate.c: wrap do_move_pages_to_node() and store_status() Wei Yang
2020-01-28 10:14 ` David Hildenbrand [this message]
2020-01-29 0:38 ` Wei Yang
2020-01-29 9:28 ` David Hildenbrand
2020-01-29 22:00 ` Wei Yang
2020-01-22 1:16 ` [Patch v2 3/4] mm/migrate.c: check pagelist in move_pages_and_store_status() Wei Yang
2020-01-28 10:21 ` David Hildenbrand
2020-01-29 0:46 ` Wei Yang
2020-01-29 9:36 ` David Hildenbrand
2020-01-22 1:16 ` [Patch v2 4/4] mm/migrate.c: handle same node and add failure in the same way Wei Yang
2020-01-29 10:13 ` David Hildenbrand
2020-01-29 22:07 ` Wei Yang
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