Extract function async_high_read/async_low_read. Link: https://www.alibabacloud.com/help/zh/alinux/user-guide/memcg-backend-asynchr... Signed-off-by: Liu Shixin <liushixin2@huawei.com> --- mm/memcontrol.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 00b04c0ce172..c178ffbdb202 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2493,6 +2493,17 @@ static unsigned long reclaim_high(struct mem_cgroup *memcg, } #ifdef CONFIG_MEMCG_V1_RECLAIM +static unsigned long async_high_read(struct mem_cgroup *memcg) +{ + return READ_ONCE(memcg->memory.high) * READ_ONCE(memcg->high_async_ratio) / HIGH_ASYNC_RATIO_BASE; +} + +static unsigned long async_low_read(struct mem_cgroup *memcg) +{ + return async_high_read(memcg) - + READ_ONCE(memcg->memory.high) * HIGH_ASYNC_RATIO_GAP / HIGH_ASYNC_RATIO_BASE; +} + static bool is_high_async_reclaim(struct mem_cgroup *memcg) { int ratio = READ_ONCE(memcg->high_async_ratio); @@ -2501,17 +2512,14 @@ static bool is_high_async_reclaim(struct mem_cgroup *memcg) if (ratio == HIGH_ASYNC_RATIO_BASE || memcg_high == PAGE_COUNTER_MAX) return false; - return page_counter_read(&memcg->memory) > - memcg_high * ratio / HIGH_ASYNC_RATIO_BASE; + return page_counter_read(&memcg->memory) > async_high_read(memcg); } static void async_reclaim_high(struct mem_cgroup *memcg) { unsigned long nr_pages, pflags; - unsigned long memcg_high = READ_ONCE(memcg->memory.high); unsigned long memcg_usage = page_counter_read(&memcg->memory); - int ratio = READ_ONCE(memcg->high_async_ratio) - HIGH_ASYNC_RATIO_GAP; - unsigned long safe_pages = memcg_high * ratio / HIGH_ASYNC_RATIO_BASE; + unsigned long safe_pages = async_low_read(memcg); if (!is_high_async_reclaim(memcg)) { WRITE_ONCE(memcg->high_async_reclaim, false); -- 2.34.1