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| author | Vladimir Davydov <vdavydov@virtuozzo.com> | 2016-07-27 01:24:27 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 02:19:19 +0300 |
| commit | 5e8d35f849b1969b900695ae191326bfacf6bfc6 (patch) | |
| tree | 44abca20811fc74b8753b3948f10f637af65d1a2 /mm/memcontrol.c | |
| parent | 4949148ad433f6f11cf837978b2907092ec99f3a (diff) | |
| download | linux-5e8d35f849b1969b900695ae191326bfacf6bfc6.tar.xz | |
mm: memcontrol: teach uncharge_list to deal with kmem pages
Page table pages are batched-freed in release_pages on most
architectures. If we want to charge them to kmemcg (this is what is
done later in this series), we need to teach mem_cgroup_uncharge_list to
handle kmem pages.
Link: http://lkml.kernel.org/r/18d5c09e97f80074ed25b97a7d0f32b95d875717.1464079538.git.vdavydov@virtuozzo.com
Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 42 |
1 files changed, 24 insertions, 18 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 089ef3614155..ff53e348c4bb 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5505,15 +5505,18 @@ void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, static void uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout, unsigned long nr_anon, unsigned long nr_file, - unsigned long nr_huge, struct page *dummy_page) + unsigned long nr_huge, unsigned long nr_kmem, + struct page *dummy_page) { - unsigned long nr_pages = nr_anon + nr_file; + unsigned long nr_pages = nr_anon + nr_file + nr_kmem; unsigned long flags; if (!mem_cgroup_is_root(memcg)) { page_counter_uncharge(&memcg->memory, nr_pages); if (do_memsw_account()) page_counter_uncharge(&memcg->memsw, nr_pages); + if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && nr_kmem) + page_counter_uncharge(&memcg->kmem, nr_kmem); memcg_oom_recover(memcg); } @@ -5536,6 +5539,7 @@ static void uncharge_list(struct list_head *page_list) unsigned long nr_anon = 0; unsigned long nr_file = 0; unsigned long nr_huge = 0; + unsigned long nr_kmem = 0; unsigned long pgpgout = 0; struct list_head *next; struct page *page; @@ -5546,8 +5550,6 @@ static void uncharge_list(struct list_head *page_list) */ next = page_list->next; do { - unsigned int nr_pages = 1; - page = list_entry(next, struct page, lru); next = page->lru.next; @@ -5566,31 +5568,35 @@ static void uncharge_list(struct list_head *page_list) if (memcg != page->mem_cgroup) { if (memcg) { uncharge_batch(memcg, pgpgout, nr_anon, nr_file, - nr_huge, page); - pgpgout = nr_anon = nr_file = nr_huge = 0; + nr_huge, nr_kmem, page); + pgpgout = nr_anon = nr_file = + nr_huge = nr_kmem = 0; } memcg = page->mem_cgroup; } - if (PageTransHuge(page)) { - nr_pages <<= compound_order(page); - VM_BUG_ON_PAGE(!PageTransHuge(page), page); - nr_huge += nr_pages; - } + if (!PageKmemcg(page)) { + unsigned int nr_pages = 1; - if (PageAnon(page)) - nr_anon += nr_pages; - else - nr_file += nr_pages; + if (PageTransHuge(page)) { + nr_pages <<= compound_order(page); + VM_BUG_ON_PAGE(!PageTransHuge(page), page); + nr_huge += nr_pages; + } + if (PageAnon(page)) + nr_anon += nr_pages; + else + nr_file += nr_pages; + pgpgout++; + } else + nr_kmem += 1 << compound_order(page); page->mem_cgroup = NULL; - - pgpgout++; } while (next != page_list); if (memcg) uncharge_batch(memcg, pgpgout, nr_anon, nr_file, - nr_huge, page); + nr_huge, nr_kmem, page); } /** |