From: Wei Yang <richardw.yang@linux.intel.com>
To: David Rientjes <rientjes@google.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>,
akpm@linux-foundation.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, mhocko@suse.com,
yang.shi@linux.alibaba.com
Subject: Re: [PATCH 2/8] mm/migrate.c: not necessary to check start and i
Date: Mon, 20 Jan 2020 08:31:31 +0800 [thread overview]
Message-ID: <20200120003131.GA26292@richard> (raw)
In-Reply-To: <alpine.DEB.2.21.2001191413360.43388@chino.kir.corp.google.com>
On Sun, Jan 19, 2020 at 02:14:28PM -0800, David Rientjes wrote:
>On Sun, 19 Jan 2020, Wei Yang wrote:
>
>> diff --git a/mm/migrate.c b/mm/migrate.c
>> index ba7cf4fa43a0..c3ef70de5876 100644
>> --- a/mm/migrate.c
>> +++ b/mm/migrate.c
>> @@ -1664,11 +1664,9 @@ static int do_pages_move(struct mm_struct *mm, nodemask_t task_nodes,
>> err = do_move_pages_to_node(mm, &pagelist, current_node);
>> if (err)
>> goto out;
>> - if (i > start) {
>> - err = store_status(status, start, current_node, i - start);
>> - if (err)
>> - goto out;
>> - }
>> + err = store_status(status, start, current_node, i - start);
>> + if (err)
>> + goto out;
>> current_node = NUMA_NO_NODE;
>> }
>> out_flush:
>
>Not sure this is useful, it relies on the implementation of store_status()
>when i == start and the overhead of the function call should actually be
>slower than the simple conditional to avoid it in that case?
Not sure about this.
While this patch is a transient state for the following cleanup. The purpose
of this is to make the consolidation a little easy to review.
--
Wei Yang
Help you, Help me
next prev parent reply other threads:[~2020-01-20 0:31 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 [this message]
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
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
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