From: Tang Yizhou tangyizhou@huawei.com
ascend inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI CVE: NA
-------------------------------------------------
For the implementation of Linux, statistics of RSS has a maximum 64 pages deviation (256KB) but the track of share pool are all precise. So the calculation results may be negative and confuse people.
We decide to show zeros when the results are negative. It is still imprecise, but maybe better.
Signed-off-by: Tang Yizhou tangyizhou@huawei.com Reviewed-by: Ding Tianhong dingtianhong@huawei.com Reviewed-by: Kefeng Wang wangkefeng.wang@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- mm/share_pool.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/mm/share_pool.c b/mm/share_pool.c index 37a5b94726f67..99e63bb7762ac 100644 --- a/mm/share_pool.c +++ b/mm/share_pool.c @@ -2788,9 +2788,14 @@ static int idr_proc_stat_cb(int id, void *p, void *data) file = get_mm_counter(mm, MM_FILEPAGES); shmem = get_mm_counter(mm, MM_SHMEMPAGES); total_rss = anon + file + shmem; + /* + * Statistics of RSS has a maximum 64 pages deviation (256KB). + * Please check_sync_rss_stat(). + */ non_sp_res = page2kb(total_rss) - sp_alloc_nsize; + non_sp_res = non_sp_res < 0 ? 0 : non_sp_res; non_sp_shm = page2kb(shmem) - sp_alloc_nsize; - non_sp_shm = non_sp_shm < 0 ? 0 : non_sp_shm; /* to be investigated */ + non_sp_shm = non_sp_shm < 0 ? 0 : non_sp_shm;
seq_printf(seq, "%-8d ", id); if (spg_id == 0)