From: Michal Hocko <mhocko@kernel.org> To: Wei Yang <richard.weiyang@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org>, Linux-MM <linux-mm@kvack.org>, Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>, Andrea Arcangeli <aarcange@redhat.com>, Jerome Glisse <jglisse@redhat.com>, Reza Arbab <arbab@linux.vnet.ibm.com>, Yasuaki Ishimatsu <yasu.isimatu@gmail.com>, qiuxishi@huawei.com, Kani Toshimitsu <toshi.kani@hpe.com>, slaoub@gmail.com, Joonsoo Kim <js1304@gmail.com>, Andi Kleen <ak@linux.intel.com>, David Rientjes <rientjes@google.com>, Daniel Kiper <daniel.kiper@oracle.com>, Igor Mammedov <imammedo@redhat.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, LKML <linux-kernel@vger.kernel.org>, Dan Williams <dan.j.williams@intel.com> Subject: Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section Date: Mon, 12 Jun 2017 08:49:53 +0200 [thread overview] Message-ID: <20170612064952.GE4145@dhcp22.suse.cz> (raw) In-Reply-To: <CADZGycZtBzA7E_nsKSxYZ8HFGQ2cpQqN62G4MfU1E9vwC2UfcQ@mail.gmail.com> On Sat 10-06-17 22:58:21, Wei Yang wrote: > On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang <richard.weiyang@gmail.com> wrote: [...] > > Hmm... one question about the memory_block behavior. > > > > In case one memory_block contains more than one memory section. > > If one section is "device zone", the whole memory_block is not visible > > in sysfs. Or until the whole memory_block is full, the sysfs is visible. > > > > Ok, I made a mistake here. The memory_block device is visible in this > case, while the sysfs link between memory_block and node is not visible > for the whole memory_block device. yes the behavior is quite messy > > BTW, current register_mem_sect_under_node() will create the sysfs > link between memory_block and node for each pfn, while actually > we only need one link between them. If I am correct. > > If you think it is fine, I would like to change this one to create the link > on section base. My longer term plan was to unify all the code to be either memory block or memory section oriented. The first sounds more logical from the user visible granularity point of view but there might be some corner cases which would require to use section based approach. I didn't have time to study that. If you want to play with that, feel free of course. -- Michal Hocko SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org> To: Wei Yang <richard.weiyang@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org>, Linux-MM <linux-mm@kvack.org>, Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>, Andrea Arcangeli <aarcange@redhat.com>, Jerome Glisse <jglisse@redhat.com>, Reza Arbab <arbab@linux.vnet.ibm.com>, Yasuaki Ishimatsu <yasu.isimatu@gmail.com>, qiuxishi@huawei.com, Kani Toshimitsu <toshi.kani@hpe.com>, slaoub@gmail.com, Joonsoo Kim <js1304@gmail.com>, Andi Kleen <ak@linux.intel.com>, David Rientjes <rientjes@google.com>, Daniel Kiper <daniel.kiper@oracle.com>, Igor Mammedov <imammedo@redhat.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, LKML <linux-kernel@vger.kernel.org>, Dan Williams <dan.j.williams@intel.com> Subject: Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section Date: Mon, 12 Jun 2017 08:49:53 +0200 [thread overview] Message-ID: <20170612064952.GE4145@dhcp22.suse.cz> (raw) In-Reply-To: <CADZGycZtBzA7E_nsKSxYZ8HFGQ2cpQqN62G4MfU1E9vwC2UfcQ@mail.gmail.com> On Sat 10-06-17 22:58:21, Wei Yang wrote: > On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang <richard.weiyang@gmail.com> wrote: [...] > > Hmm... one question about the memory_block behavior. > > > > In case one memory_block contains more than one memory section. > > If one section is "device zone", the whole memory_block is not visible > > in sysfs. Or until the whole memory_block is full, the sysfs is visible. > > > > Ok, I made a mistake here. The memory_block device is visible in this > case, while the sysfs link between memory_block and node is not visible > for the whole memory_block device. yes the behavior is quite messy > > BTW, current register_mem_sect_under_node() will create the sysfs > link between memory_block and node for each pfn, while actually > we only need one link between them. If I am correct. > > If you think it is fine, I would like to change this one to create the link > on section base. My longer term plan was to unify all the code to be either memory block or memory section oriented. The first sounds more logical from the user visible granularity point of view but there might be some corner cases which would require to use section based approach. I didn't have time to study that. If you want to play with that, feel free of course. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-06-12 6:49 UTC|newest] Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-15 8:58 [PATCH -v4 0/14] mm: make movable onlining suck less Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 01/14] mm: remove return value from init_currently_empty_zone Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 02/14] mm, memory_hotplug: use node instead of zone in can_online_high_movable Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 03/14] mm: drop page_initialized check from get_nid_for_pfn Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-06-10 9:56 ` Wei Yang 2017-06-10 9:56 ` Wei Yang 2017-06-10 14:58 ` Wei Yang 2017-06-10 14:58 ` Wei Yang 2017-06-12 6:49 ` Michal Hocko [this message] 2017-06-12 6:49 ` Michal Hocko 2017-06-14 6:17 ` Wei Yang 2017-06-14 6:12 ` Wei Yang 2017-06-14 6:32 ` Michal Hocko 2017-06-14 6:32 ` Michal Hocko 2017-06-14 9:12 ` Wei Yang 2017-06-14 9:24 ` Michal Hocko 2017-06-14 9:24 ` Michal Hocko 2017-06-15 1:02 ` Wei Yang 2017-05-15 8:58 ` [PATCH 05/14] mm, memory_hotplug: split up register_one_node Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 06/14] mm, memory_hotplug: consider offline memblocks removable Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 07/14] mm: consider zone which is not fully populated to have holes Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-18 16:14 ` Vlastimil Babka 2017-05-18 16:14 ` Vlastimil Babka 2017-05-18 16:42 ` Michal Hocko 2017-05-18 16:42 ` Michal Hocko 2017-05-19 7:21 ` Vlastimil Babka 2017-05-19 7:21 ` Vlastimil Babka 2017-05-15 8:58 ` [PATCH 08/14] mm, compaction: skip over holes in __reset_isolation_suitable Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-19 7:23 ` Vlastimil Babka 2017-05-19 7:23 ` Vlastimil Babka 2017-05-15 8:58 ` [PATCH 09/14] mm: __first_valid_page skip over offline pages Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-19 8:05 ` Vlastimil Babka 2017-05-19 8:05 ` Vlastimil Babka 2017-05-15 8:58 ` [PATCH 10/14] mm, vmstat: skip reporting offline pages in pagetypeinfo Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-19 8:17 ` Vlastimil Babka 2017-05-19 8:17 ` Vlastimil Babka 2017-05-15 8:58 ` [PATCH 11/14] mm, memory_hotplug: do not associate hotadded memory to zones until online Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-19 8:56 ` Vlastimil Babka 2017-05-19 8:56 ` Vlastimil Babka 2017-06-16 4:20 ` Wei Yang 2017-06-16 8:05 ` Michal Hocko 2017-06-16 8:05 ` Michal Hocko 2017-06-16 8:11 ` Wei Yang 2017-06-16 8:45 ` Michal Hocko 2017-06-16 8:45 ` Michal Hocko 2017-06-16 9:11 ` Wei Yang 2017-06-25 0:14 ` Wei Yang 2017-06-26 5:38 ` Michal Hocko 2017-06-26 5:38 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 12/14] mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 13/14] mm, memory_hotplug: fix the section mismatch warning Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-05-15 8:58 ` [PATCH 14/14] mm, memory_hotplug: remove unused cruft after memory hotplug rework Michal Hocko 2017-05-15 8:58 ` Michal Hocko 2017-06-09 9:51 ` [PATCH -v4 0/14] mm: make movable onlining suck less Wei Yang 2017-06-09 9:51 ` Wei Yang 2017-06-09 10:49 ` Michal Hocko 2017-06-09 10:49 ` Michal Hocko 2017-06-10 2:20 ` Wei Yang 2017-06-10 2:20 ` 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=20170612064952.GE4145@dhcp22.suse.cz \ --to=mhocko@kernel.org \ --cc=aarcange@redhat.com \ --cc=ak@linux.intel.com \ --cc=akpm@linux-foundation.org \ --cc=arbab@linux.vnet.ibm.com \ --cc=dan.j.williams@intel.com \ --cc=daniel.kiper@oracle.com \ --cc=imammedo@redhat.com \ --cc=jglisse@redhat.com \ --cc=js1304@gmail.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-mm@kvack.org \ --cc=mgorman@suse.de \ --cc=qiuxishi@huawei.com \ --cc=richard.weiyang@gmail.com \ --cc=rientjes@google.com \ --cc=slaoub@gmail.com \ --cc=toshi.kani@hpe.com \ --cc=vbabka@suse.cz \ --cc=vkuznets@redhat.com \ --cc=yasu.isimatu@gmail.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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.