Introduce a control file memory.watermark showing the watermark consumption of the cgroup and its descendants, in bytes.
Signed-off-by: Xi Ruoyao <[email protected]> --- mm/memcontrol.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ba9138a4a1de..b1d968f2adcd 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5495,6 +5495,13 @@ static u64 memory_current_read(struct cgroup_subsys_state *css, return (u64)page_counter_read(&memcg->memory) * PAGE_SIZE; } +static u64 memory_watermark_read(struct cgroup_subsys_state *css, + struct cftype *cft) +{ + struct mem_cgroup *memcg = mem_cgroup_from_css(css); + return (u64)memcg->memory.watermark * PAGE_SIZE; +} + static int memory_min_show(struct seq_file *m, void *v) { return seq_puts_memcg_tunable(m, @@ -5771,6 +5778,11 @@ static struct cftype memory_files[] = { .flags = CFTYPE_NOT_ON_ROOT, .read_u64 = memory_current_read, }, + { + .name = "watermark", + .flags = CFTYPE_NOT_ON_ROOT, + .read_u64 = memory_watermark_read, + }, { .name = "min", .flags = CFTYPE_NOT_ON_ROOT, -- Xi Ruoyao <[email protected]> School of Aerospace Science and Technology, Xidian University
