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From: "Huang, Ying" <ying.huang@intel.com>
To: Oscar Salvador <osalvador@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>,
	 Abhishek Goel <huntbag@linux.vnet.ibm.com>,
	 Dave Hansen <dave.hansen@linux.intel.com>,
	linux-mm@kvack.org,  linux-kernel@vger.kernel.org,
	 Zi Yan <ziy@nvidia.com>,  David Hildenbrand <david@redhat.com>,
	 Yang Shi <yang.shi@linux.alibaba.com>,
	 Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH -V11 2/9] mm/migrate: update node demotion order on hotplug events
Date: Wed, 09 Mar 2022 08:29:40 +0800	[thread overview]
Message-ID: <87k0d4ge8b.fsf@yhuang6-desk2.ccr.corp.intel.com> (raw)
In-Reply-To: <Yiem+4YbComC0EGC@localhost.localdomain> (Oscar Salvador's message of "Tue, 8 Mar 2022 19:56:59 +0100")

Oscar Salvador <osalvador@suse.de> writes:

> On Tue, Mar 08, 2022 at 09:07:20AM -0800, Dave Hansen wrote:
>> On 3/8/22 02:27, Oscar Salvador wrote:
>> > @@ -2043,7 +2044,12 @@ static void __init init_cpu_node_state(void)
>> >  static int vmstat_cpu_online(unsigned int cpu)
>> >  {
>> >  	refresh_zone_stat_thresholds();
>> > -	node_set_state(cpu_to_node(cpu), N_CPU);
>> > +
>> > +	if (!node_state(cpu_to_node(cpu), N_CPU)) {
>> > +		node_set_state(cpu_to_node(cpu), N_CPU);
>> > +		set_migration_target_nodes();
>> > +	}
>> > +
>> >  	return 0;
>> >  }
>> > 
>> > @@ -2066,6 +2072,8 @@ static int vmstat_cpu_dead(unsigned int cpu)
>> >  		return 0;
>> > 
>> >  	node_clear_state(node, N_CPU);
>> > +	set_migration_target_nodes();
>> > +
>> >  	return 0;
>> >  }
>> 
>> Yeah, those callbacks do look like they're reinventing the wheel.  This
>> is a much more direct way of doing it.
>
> Then let me play a bit more with it and I can cook a patch unless
> someone feels strong against it.

This looks good to me, Thanks!

Best Regards,
Huang, Ying


  reply	other threads:[~2022-03-09  0:29 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21  6:39 [PATCH -V11 1/9] mm/numa: automatically generate node migration order Huang Ying
2021-07-21  6:39 ` [PATCH -V11 2/9] mm/migrate: update node demotion order on hotplug events Huang Ying
2022-02-23 23:02   ` Abhishek Goel
2022-02-24  0:05     ` Dave Hansen
2022-02-24 23:37       ` Abhishek Goel
2022-02-25  0:49         ` Dave Hansen
2022-02-25  2:32         ` Huang, Ying
2022-02-25 20:35           ` Abhishek Goel
2022-03-08 10:27           ` Oscar Salvador
2022-03-08 17:07             ` Dave Hansen
2022-03-08 18:56               ` Oscar Salvador
2022-03-09  0:29                 ` Huang, Ying [this message]
2021-07-21  6:39 ` [PATCH -V11 3/9] mm/migrate: enable returning precise migrate_pages() success count Huang Ying
2021-07-21  6:39 ` [PATCH -V11 4/9] mm/migrate: demote pages during reclaim Huang Ying
2021-07-21 21:11   ` Zi Yan
2021-07-21  6:39 ` [PATCH -V11 5/9] mm/vmscan: add page demotion counter Huang Ying
2021-07-21 21:13   ` Zi Yan
2021-07-21  6:39 ` [PATCH -V11 6/9] mm/vmscan: add helper for querying ability to age anonymous pages Huang Ying
2021-07-21 21:15   ` Zi Yan
2021-07-21  6:39 ` [PATCH -V11 7/9] mm/vmscan: Consider anonymous pages without swap Huang Ying
2021-07-21 21:21   ` Zi Yan
2021-07-21  6:39 ` [PATCH -V11 8/9] mm/vmscan: never demote for memcg reclaim Huang Ying
2021-07-21 21:38   ` Zi Yan
2021-07-21 21:58     ` Dave Hansen
2021-07-21 21:59       ` Zi Yan
2021-07-21 22:03       ` Yang Shi
2021-07-21  6:39 ` [PATCH -V11 9/9] mm/migrate: add sysfs interface to enable reclaim migration Huang Ying

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