在 2022/01/26 4:41, Christoph Hellwig 写道:
On Tue, Jan 25, 2022 at 08:26:54PM +0800, Yu Kuai wrote:
If blk_mq_request_issue_directly() failed from
blk_insert_cloned_request(), the request will be accounted start.
Currently, blk_insert_cloned_request() is only called by dm, and such
request won't be accounted done by dm.
In normal path, io will be accounted start from blk_mq_bio_to_request(),
when the request is allocated, and such io will be accounted done from
__blk_mq_end_request_acct() whether it succeeded or failed. Thus add
blk_account_io_done() to fix the problem.
The patch looks good, but the subject is incorrect, this is not in
dm-mpath but in the block layer.
.
Ok, I'll fix that.
Thanks,
Kuai
