Re: [PATCH 7/8] blk-mq: add blk_mq_all_tag_iter

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On 5/27/20 8:06 PM, Christoph Hellwig wrote:
From: Ming Lei <ming.lei@xxxxxxxxxx>

Add a new blk_mq_all_tag_iter function to iterate over all allocated
scheduler tags and driver tags.  This is more flexible than the existing
blk_mq_all_tag_busy_iter function as it allows the callers to do whatever
they want on allocated request instead of being limited to started
requests.

It will be used to implement draining allocated requests on specified
hctx in this patchset.

Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
[hch: switch from the two booleans to a more readable flags field and
  consolidate the tags iter functions]
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
  block/blk-mq-tag.c | 46 +++++++++++++++++++++++++++++-----------------
  block/blk-mq-tag.h |  2 ++
  2 files changed, 31 insertions(+), 17 deletions(-)

Reviewed-by: Hannes Reinecke <hare@xxxxxxx>

Cheers,

Hannes
--
Dr. Hannes Reinecke            Teamlead Storage & Networking
hare@xxxxxxx                               +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer



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