• Dennis Zhou's avatar
    blkcg: associate blkg when associating a device · 5cdf2e3f
    Dennis Zhou authored
    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: default avatarDennis Zhou <dennis@kernel.org>
    Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    5cdf2e3f
blk-cgroup.h 26.9 KB