blkcg: associate blkg when associating a device
Previously, blkg association was handled by controller specific code in blk-throttle and blk-iolatency. However, because a blkg represents a relationship between a blkcg and a request_queue, it makes sense to keep the blkg->q and bio->bi_disk->queue consistent. This patch moves association into the bio_set_dev macro(). This should cover the majority of cases where the device is set/changed keeping the two pointers consistent. Fallback code is added to blkcg_bio_issue_check() to catch any missing paths. Signed-off-by:Dennis Zhou <dennis@kernel.org> Reviewed-by:
Josef Bacik <josef@toxicpanda.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
892ad71f
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