From: Michal Hocko <mhocko@kernel.org>
To: Wei Yang <richardw.yang@linux.intel.com>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, yang.shi@linux.alibaba.com
Subject: Re: [PATCH 5/8] mm/migrate.c: check pagelist in move_pages_and_store_status()
Date: Mon, 20 Jan 2020 10:52:16 +0100 [thread overview]
Message-ID: <20200120095216.GP18451@dhcp22.suse.cz> (raw)
In-Reply-To: <20200119030636.11899-6-richardw.yang@linux.intel.com>
On Sun 19-01-20 11:06:33, 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.
OK looks good to me.
> 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 dec147d3a4dd..46a5697b7fc6 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;
> @@ -1679,9 +1679,6 @@ 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;
> -
> /* Make sure we do not overwrite the existing error */
> err1 = move_pages_and_store_status(mm, current_node, &pagelist,
> status, start, i - start);
> --
> 2.17.1
>
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2020-01-20 9:52 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-19 3:06 [PATCH 0/8] mm/migrate.c: cleanup on do_pages_move() Wei Yang
2020-01-19 3:06 ` [PATCH 1/8] mm/migrate.c: skip node check if done in last round Wei Yang
2020-01-20 9:36 ` Michal Hocko
2020-01-20 22:25 ` Wei Yang
2020-01-21 8:42 ` Michal Hocko
2020-01-22 0:36 ` Wei Yang
2020-01-22 8:16 ` Michal Hocko
2020-01-19 3:06 ` [PATCH 2/8] mm/migrate.c: not necessary to check start and i Wei Yang
2020-01-19 22:14 ` David Rientjes
2020-01-20 0:31 ` Wei Yang
2020-01-20 9:45 ` Michal Hocko
2020-01-19 3:06 ` [PATCH 3/8] mm/migrate.c: reform the last call on do_move_pages_to_node() Wei Yang
2020-01-20 9:46 ` Michal Hocko
2020-01-20 22:27 ` Wei Yang
2020-01-19 3:06 ` [PATCH 4/8] mm/migrate.c: wrap do_move_pages_to_node() and store_status() Wei Yang
2020-01-20 9:49 ` Michal Hocko
2020-01-19 3:06 ` [PATCH 5/8] mm/migrate.c: check pagelist in move_pages_and_store_status() Wei Yang
2020-01-20 9:52 ` Michal Hocko [this message]
2020-01-19 3:06 ` [PATCH 6/8] mm/migrate.c: handle same node and add failure in the same way Wei Yang
2020-01-20 10:01 ` Michal Hocko
2020-01-19 3:06 ` [PATCH 7/8] mm/migrate.c: move page on next iteration Wei Yang
2020-01-20 10:02 ` Michal Hocko
2020-01-21 1:22 ` Wei Yang
2020-01-21 8:43 ` Michal Hocko
2020-01-22 0:40 ` Wei Yang
2020-01-22 8:17 ` Michal Hocko
2020-01-19 3:06 ` [PATCH 8/8] mm/migrate.c: use break instead of goto out_flush Wei Yang
2020-01-20 10:03 ` Michal Hocko
2020-01-21 1:22 ` 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=20200120095216.GP18451@dhcp22.suse.cz \
--to=mhocko@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=richardw.yang@linux.intel.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).