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 3/4] mm/migrate.c: check pagelist in move_pages_and_store_status()
Date: Tue, 28 Jan 2020 11:21:13 +0100 [thread overview]
Message-ID: <f7f70c42-a9a6-6c84-cdb5-230205703ddf@redhat.com> (raw)
In-Reply-To: <20200122011647.13636-4-richardw.yang@linux.intel.com>
On 22.01.20 02:16, Wei Yang wrote:
> When pagelist is empty, it is not necessary to do the move and store.
> Also it consolidate the empty list check in one place.
>
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
> Acked-by: Michal Hocko <mhocko@suse.com>
> ---
> mm/migrate.c | 9 +++------
> 1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/mm/migrate.c b/mm/migrate.c
> index a4d3bd6475e1..80d2bba57265 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -1499,9 +1499,6 @@ static int do_move_pages_to_node(struct mm_struct *mm,
> {
> int err;
>
> - if (list_empty(pagelist))
> - return 0;
> -
> err = migrate_pages(pagelist, alloc_new_node_page, NULL, node,
> MIGRATE_SYNC, MR_SYSCALL);
> if (err)
> @@ -1589,6 +1586,9 @@ static int move_pages_and_store_status(struct mm_struct *mm, int node,
> {
> int err;
>
> + if (list_empty(pagelist))
> + return 0;
> +
> err = do_move_pages_to_node(mm, pagelist, node);
> if (err)
> return err;
> @@ -1676,9 +1676,6 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
> current_node = NUMA_NO_NODE;
> }
> out_flush:
> - if (list_empty(&pagelist))
> - return err;
Am I wrong or are you discarding an error here? (err could be !0)
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2020-01-28 10:21 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
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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f7f70c42-a9a6-6c84-cdb5-230205703ddf@redhat.com \
--to=david@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhocko@suse.com \
--cc=richardw.yang@linux.intel.com \
--cc=rientjes@google.com \
--cc=yang.shi@linux.alibaba.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).