From: Matthew Wilcox <willy@infradead.org>
To: Michal Hocko <mhocko@suse.com>
Cc: linux-mm@kvack.org, cgroups@vger.kernel.org,
Johannes Weiner <hannes@cmpxchg.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>
Subject: Re: [PATCH v3 14/18] mm/memcg: Convert mem_cgroup_move_account() to use a folio
Date: Wed, 30 Jun 2021 13:31:17 +0100 [thread overview]
Message-ID: <YNxkFSGUoaSzZ/36@casper.infradead.org> (raw)
In-Reply-To: <YNxhlr4d7Nl0vCz0@dhcp22.suse.cz>
On Wed, Jun 30, 2021 at 02:20:38PM +0200, Michal Hocko wrote:
> On Wed 30-06-21 12:22:48, Matthew Wilcox wrote:
> > We need to decide what 'NR_ANON_THPS' means in a folio-based world where
> > we have folios of all orders. Does it count only the number of pages
> > in folios >= HPAGE_PMD_SIZE? Or does it count the number of pages in
> > folios > PAGE_SIZE?
>
> At this stage we only have PMD based, right? I believe it would be
> simpler to stick with that at the moment and change that to a more
> generic way along with other places which need updating.
>
> Wrt. counters they do count pages so in this case this shouldn't be a
> problem. But we do have counters for pmd mappings and that might need
> some care.
Looking at how these are reported:
show_val_kb(m, "AnonHugePages: ",
global_node_page_state(NR_ANON_THPS));
show_val_kb(m, "ShmemHugePages: ",
global_node_page_state(NR_SHMEM_THPS));
show_val_kb(m, "ShmemPmdMapped: ",
global_node_page_state(NR_SHMEM_PMDMAPPED));
show_val_kb(m, "FileHugePages: ",
global_node_page_state(NR_FILE_THPS));
show_val_kb(m, "FilePmdMapped: ",
global_node_page_state(NR_FILE_PMDMAPPED));
it specifically refers to 'HugePages', so I think we need to only
count folios with order >= PMD_ORDER. I'll make that change to
folio_transhuge() and use folio_transhuge() here.
next prev parent reply other threads:[~2021-06-30 12:31 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 4:00 [PATCH v3 00/18] Folio conversion of memcg Matthew Wilcox (Oracle)
2021-06-30 4:00 ` [PATCH v3 01/18] mm: Add folio_nid() Matthew Wilcox (Oracle)
2021-07-01 6:56 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 02/18] mm/memcg: Remove 'page' parameter to mem_cgroup_charge_statistics() Matthew Wilcox (Oracle)
2021-06-30 14:17 ` Johannes Weiner
2021-06-30 4:00 ` [PATCH v3 03/18] mm/memcg: Use the node id in mem_cgroup_update_tree() Matthew Wilcox (Oracle)
2021-06-30 6:55 ` Michal Hocko
2021-06-30 14:18 ` Johannes Weiner
2021-07-01 6:57 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 04/18] mm/memcg: Remove soft_limit_tree_node() Matthew Wilcox (Oracle)
2021-06-30 6:56 ` Michal Hocko
2021-06-30 14:19 ` Johannes Weiner
2021-07-01 7:09 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 05/18] mm/memcg: Convert memcg_check_events to take a node ID Matthew Wilcox (Oracle)
2021-06-30 6:58 ` Michal Hocko
2021-06-30 6:59 ` Michal Hocko
2021-07-01 7:09 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 06/18] mm/memcg: Add folio_memcg() and related functions Matthew Wilcox (Oracle)
2021-06-30 6:53 ` kernel test robot
2021-07-01 7:12 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 07/18] mm/memcg: Convert commit_charge() to take a folio Matthew Wilcox (Oracle)
2021-06-30 4:00 ` [PATCH v3 08/18] mm/memcg: Convert mem_cgroup_charge() " Matthew Wilcox (Oracle)
2021-06-30 7:17 ` kernel test robot
2021-07-01 7:13 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 09/18] mm/memcg: Convert uncharge_page() to uncharge_folio() Matthew Wilcox (Oracle)
2021-07-01 7:15 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 10/18] mm/memcg: Convert mem_cgroup_uncharge() to take a folio Matthew Wilcox (Oracle)
2021-06-30 8:46 ` kernel test robot
2021-07-01 7:17 ` Christoph Hellwig
2021-07-07 12:09 ` Matthew Wilcox
2021-06-30 4:00 ` [PATCH v3 11/18] mm/memcg: Convert mem_cgroup_migrate() to take folios Matthew Wilcox (Oracle)
2021-07-01 7:20 ` Christoph Hellwig
2021-06-30 4:00 ` [PATCH v3 12/18] mm/memcg: Convert mem_cgroup_track_foreign_dirty_slowpath() to folio Matthew Wilcox (Oracle)
2021-06-30 4:00 ` [PATCH v3 13/18] mm/memcg: Add folio_memcg_lock() and folio_memcg_unlock() Matthew Wilcox (Oracle)
2021-06-30 8:32 ` Michal Hocko
2021-07-07 15:10 ` Matthew Wilcox
2021-07-08 7:28 ` Michal Hocko
2021-07-07 17:08 ` Johannes Weiner
2021-07-07 19:28 ` Matthew Wilcox
2021-07-07 20:41 ` Johannes Weiner
2021-07-09 19:37 ` Matthew Wilcox
2021-06-30 4:00 ` [PATCH v3 14/18] mm/memcg: Convert mem_cgroup_move_account() to use a folio Matthew Wilcox (Oracle)
2021-06-30 8:30 ` Michal Hocko
2021-06-30 11:22 ` Matthew Wilcox
2021-06-30 12:20 ` Michal Hocko
2021-06-30 12:31 ` Matthew Wilcox [this message]
2021-06-30 12:45 ` Michal Hocko
2021-07-07 15:25 ` Matthew Wilcox
2021-07-08 7:30 ` Michal Hocko
2021-06-30 4:00 ` [PATCH v3 15/18] mm/memcg: Add mem_cgroup_folio_lruvec() Matthew Wilcox (Oracle)
2021-06-30 8:12 ` kernel test robot
2021-06-30 19:18 ` Matthew Wilcox
2021-06-30 21:21 ` Johannes Weiner
2021-06-30 4:00 ` [PATCH v3 16/18] mm/memcg: Add folio_lruvec_lock() and similar functions Matthew Wilcox (Oracle)
2021-06-30 8:36 ` Michal Hocko
2021-06-30 4:00 ` [PATCH v3 17/18] mm/memcg: Add folio_lruvec_relock_irq() and folio_lruvec_relock_irqsave() Matthew Wilcox (Oracle)
2021-06-30 8:39 ` Michal Hocko
2021-06-30 4:00 ` [PATCH v3 18/18] mm/workingset: Convert workingset_activation to take a folio Matthew Wilcox (Oracle)
2021-06-30 8:44 ` [PATCH v3 00/18] Folio conversion of memcg Michal Hocko
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