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| author | Johannes Weiner <hannes@cmpxchg.org> | 2015-11-05 18:50:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-05 19:34:48 -0800 |
| commit | 6071ca5201066f4b2a61cfb693dd186d6bc6e9f3 (patch) | |
| tree | 2ec2fa58fc43986025267568feb96c7b86a2722c /mm/memcontrol.c | |
| parent | f5fc3c5d817435970aa301d066820a9ac12c8120 (diff) | |
| download | lwn-6071ca5201066f4b2a61cfb693dd186d6bc6e9f3.tar.gz lwn-6071ca5201066f4b2a61cfb693dd186d6bc6e9f3.zip | |
mm: page_counter: let page_counter_try_charge() return bool
page_counter_try_charge() currently returns 0 on success and -ENOMEM on
failure, which is surprising behavior given the function name.
Make it follow the expected pattern of try_stuff() functions that return a
boolean true to indicate success, or false for failure.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov@virtuozzo.com
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 | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 59b100fde35f..d47de73d7c36 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2016,8 +2016,8 @@ retry: return 0; if (!do_swap_account || - !page_counter_try_charge(&memcg->memsw, batch, &counter)) { - if (!page_counter_try_charge(&memcg->memory, batch, &counter)) + page_counter_try_charge(&memcg->memsw, batch, &counter)) { + if (page_counter_try_charge(&memcg->memory, batch, &counter)) goto done_restock; if (do_swap_account) page_counter_uncharge(&memcg->memsw, batch); @@ -2381,14 +2381,13 @@ int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order, { unsigned int nr_pages = 1 << order; struct page_counter *counter; - int ret = 0; + int ret; if (!memcg_kmem_is_active(memcg)) return 0; - ret = page_counter_try_charge(&memcg->kmem, nr_pages, &counter); - if (ret) - return ret; + if (!page_counter_try_charge(&memcg->kmem, nr_pages, &counter)) + return -ENOMEM; ret = try_charge(memcg, gfp, nr_pages); if (ret) { |