Support I/O polling if submit_bio_noacct_mq_direct returned non-empty cookie.
Signed-off-by: Mikulas Patocka <[email protected]> --- drivers/md/dm.c | 5 +++++ 1 file changed, 5 insertions(+) Index: linux-2.6/drivers/md/dm.c =================================================================== --- linux-2.6.orig/drivers/md/dm.c 2021-03-02 19:26:34.000000000 +0100 +++ linux-2.6/drivers/md/dm.c 2021-03-02 19:26:34.000000000 +0100 @@ -1682,6 +1682,11 @@ static void __split_and_process_bio(stru } } + if (ci.poll_cookie != BLK_QC_T_NONE) { + while (atomic_read(&ci.io->io_count) > 1 && + blk_poll(ci.poll_queue, ci.poll_cookie, true)) ; + } + /* drop the extra reference count */ dec_pending(ci.io, errno_to_blk_status(error)); } -- dm-devel mailing list [email protected] https://listman.redhat.com/mailman/listinfo/dm-devel
