blk-mq: Shared tag enhancements

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Storage controllers may expose multiple block devices that share hardware
resources managed by blk-mq. This patch enhances the shared tags so a
low-level driver can access the shared resources not tied to the unshared
h/w contexts. This way the LLD can dynamically add and delete disks and
request queues without having to track all the request_queue hctx's to
iterate outstanding tags.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Keith Busch 2015-06-01 09:29:53 -06:00 • committed by Jens Axboe

parent e548ca4ee4

commit f26cdc8536

4 changed files with 53 additions and 2 deletions

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include/linux/blk-mq.h

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