-----Original Message-----
From: John Garry [mailto:john.garry@huawei.com]
Sent: Monday, October 18, 2021 3:11 PM
To: axboe@kernel.dk
Cc: ming.lei@redhat.com; linux-block@vger.kernel.org; linux-
kernel@vger.kernel.org; kashyap.desai@broadcom.com; hare@suse.de; John
Garry [off-list ref]
Subject: [PATCH v2] blk-mq: Fix blk_mq_tagset_busy_iter() for shared

tags

Since it is now possible for a tagset to share a single set of tags, the

iter

function should not re-iter the tags for the count of #hw queues in that

case.

Rather it should just iter once.

Fixes: e0fdf846c7bb ("blk-mq: Use shared tags for shared sbitmap

support")

Reported-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: John Garry <redacted>
Reviewed-by: Ming Lei <redacted>
---
Diff to v1:
- Add Ming's RB tag

Now I noticed proper host_busy in my test. Still CPU hogging is not
resolved, but issue addressed by this patch is resolved.

Tested-by: Kashyap Desai <kashyap.desai@broadcom.com>