!2078 [sync] PR-2065: dm: switch to precise io accounting

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/2065 
 
PR sync from: Li Nan <linan122@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/RRHS6ZE4XUWUMX3CZPN6QMJLXRWNXM66/ 
 
https://gitee.com/openeuler/kernel/issues/I7WMMI 
 
Link:https://gitee.com/openeuler/kernel/pulls/2078

 

Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>