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authorJakub Kicinski <kuba@kernel.org>2020-06-02 07:49:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-02 20:59:09 +0300
commitd1663a907bd348f912b7f7088e83ca1b6fd3309f (patch)
treeb5bb5b03cd6958cead5ce23c45680dff016062b8 /include/linux/page_counter.h
parentff144e69f7331eff070f31edf22bc9123d6d6d27 (diff)
downloadlinux-d1663a907bd348f912b7f7088e83ca1b6fd3309f.tar.xz
mm/memcg: move cgroup high memory limit setting into struct page_counter
High memory limit is currently recorded directly in struct mem_cgroup. We are about to add a high limit for swap, move the field to struct page_counter and add some helpers. Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Chris Down <chris@chrisdown.name> Cc: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Tejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/20200527195846.102707-4-kuba@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/page_counter.h')
-rw-r--r--include/linux/page_counter.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/page_counter.h b/include/linux/page_counter.h
index bab7e57f659b..85bd413e784e 100644
--- a/include/linux/page_counter.h
+++ b/include/linux/page_counter.h
@@ -10,6 +10,7 @@ struct page_counter {
atomic_long_t usage;
unsigned long min;
unsigned long low;
+ unsigned long high;
unsigned long max;
struct page_counter *parent;
@@ -55,6 +56,13 @@ bool page_counter_try_charge(struct page_counter *counter,
void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages);
+
+static inline void page_counter_set_high(struct page_counter *counter,
+ unsigned long nr_pages)
+{
+ WRITE_ONCE(counter->high, nr_pages);
+}
+
int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages);
int page_counter_memparse(const char *buf, const char *max,
unsigned long *nr_pages);