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| author | Roman Gushchin <guro@fb.com> | 2020-08-07 09:21:06 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-07 21:33:24 +0300 |
| commit | 0f876e4dc55db5fafef774917fd66e1373c0f390 (patch) | |
| tree | dc54c6614009fe0085a4ae87c6bbacff1c2bdd9a /include/linux | |
| parent | 4330a26bc4527f1d8918c398ebc983574f761cca (diff) | |
| download | linux-0f876e4dc55db5fafef774917fd66e1373c0f390.tar.xz | |
mm: memcg/slab: move memcg_kmem_bypass() to memcontrol.h
To make the memcg_kmem_bypass() function available outside of the
memcontrol.c, let's move it to memcontrol.h. The function is small and
nicely fits into static inline sort of functions.
It will be used from the slab code.
Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20200623174037.3951353-12-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memcontrol.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index b845e908e76e..83e2858aecf2 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1440,6 +1440,18 @@ static inline bool memcg_kmem_enabled(void) return static_branch_unlikely(&memcg_kmem_enabled_key); } +static inline bool memcg_kmem_bypass(void) +{ + if (in_interrupt()) + return true; + + /* Allow remote memcg charging in kthread contexts. */ + if ((!current->mm || (current->flags & PF_KTHREAD)) && + !current->active_memcg) + return true; + return false; +} + static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order) { |