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Groups > linux.kernel > #1683022
| From | Wei Yang <richard.weiyang@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/2] mm, memory_hotplug: remove zone restrictions |
| Date | 2017-07-07 10:40 +0200 |
| Message-ID | <u0wXT-1kR-5@gated-at.bofh.it> (permalink) |
| References | (4 earlier) <tY0IN-3Mu-17@gated-at.bofh.it> <tY0Su-3QH-13@gated-at.bofh.it> <tY1Yd-4JJ-5@gated-at.bofh.it> <u01Kq-4tO-13@gated-at.bofh.it> <u08Vz-Sf-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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On Thu, Jul 06, 2017 at 08:56:50AM +0200, Michal Hocko wrote: >> Below is a result with a little changed kernel to show the start_pfn always. >> The sequence is: >> 1. bootup >> >> Node 0, zone Movable >> spanned 65536 >> present 0 >> managed 0 >> start_pfn: 0 >> >> 2. online movable 2 continuous memory_blocks >> >> Node 0, zone Movable >> spanned 65536 >> present 65536 >> managed 65536 >> start_pfn: 1310720 >> >> 3. offline 2nd memory_blocks >> >> Node 0, zone Movable >> spanned 65536 >> present 32768 >> managed 32768 >> start_pfn: 1310720 >> >> 4. offline 1st memory_blocks >> >> Node 0, zone Movable >> spanned 65536 >> present 0 >> managed 0 >> start_pfn: 1310720 >> >> So I am not sure this is still clearly defined? > >Could you be more specific what is not clearly defined? You have >offlined all online memory blocks so present/managed is 0 while the >spanned is unchanged because the zone is still defined in range >[1310720, 1376256]. > The zone is empty after remove these two memory blocks, while we still think it is defined in range [1310720, 1376256]. This is what I want to point. >I also do not see how this is related with the discussed patch as there >is no zone interleaving involved. I had a patch which fix the behavior, which means we can make sure the zone is empty after remove these two memory blocks. As you mentioned in the reply, http://www.spinics.net/lists/linux-mm/msg130230.html, I thought you would have this fixed in this cycle. While it looks we will still have this behavior in this cycle and looks no intend to fix this? >-- >Michal Hocko >SUSE Labs -- Wei Yang Help you, Help me
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Re: [PATCH 2/2] mm, memory_hotplug: remove zone restrictions Wei Yang <richard.weiyang@gmail.com> - 2017-07-06 01:20 +0200
Re: [PATCH 2/2] mm, memory_hotplug: remove zone restrictions Michal Hocko <mhocko@kernel.org> - 2017-07-06 09:00 +0200
Re: [PATCH 2/2] mm, memory_hotplug: remove zone restrictions Wei Yang <richard.weiyang@gmail.com> - 2017-07-07 10:40 +0200
Re: [PATCH 2/2] mm, memory_hotplug: remove zone restrictions Michal Hocko <mhocko@kernel.org> - 2017-07-07 14:50 +0200
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