Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()

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To: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
From: Michal Hocko <mhocko@xxxxxxxx>
Date: Wed, 19 Dec 2018 15:39:27 +0100
Cc: Oscar Salvador <osalvador@xxxxxxx>, linux-mm@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, david@xxxxxxxxxx
In-reply-to: <20181219143327.wdsufbn2oh6ygnne@master>
References: <20181214023912.77474-1-richard.weiyang@gmail.com> <20181218204656.4297-1-richard.weiyang@gmail.com> <20181219095110.GB5758@dhcp22.suse.cz> <20181219095715.73x6hvmndyku2rec@d104.suse.de> <20181219135307.bjd6rckseczpfeae@master> <20181219141343.GN5758@dhcp22.suse.cz> <20181219143327.wdsufbn2oh6ygnne@master>
User-agent: Mutt/1.10.1 (2018-07-13)

On Wed 19-12-18 14:33:27, Wei Yang wrote:
[...]
> Then I am confused about the objection to this patch. Finally, we drain
> all the pages in pcp list and the range is isolated.

Please read my emails more carefully. As I've said, the only reason to
do care about draining is to remove it from where it doesn't belong.

-- 
Michal Hocko
SUSE Labs

Follow-Ups:
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Wei Yang

References:
- [PATCH] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Wei Yang
- [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Wei Yang
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Michal Hocko
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Oscar Salvador
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Wei Yang
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Michal Hocko
- Re: [PATCH v2] mm, page_isolation: remove drain_all_pages() in set_migratetype_isolate()
  - From: Wei Yang

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