• Ming Lei's avatar
    blk-mq-debugfs: support rq_qos · cc56694f
    Ming Lei authored
    blk-mq-debugfs has been proved as very helpful for debug some
    tough issues, such as IO hang.
    
    We have seen blk-wbt related IO hang several times, even inside
    Red Hat BZ, there is such report not sovled yet, so this patch
    adds support debugfs on rq_qos.
    
    Cc: Bart Van Assche <bart.vanassche@wdc.com>
    Cc: Omar Sandoval <osandov@fb.com>
    Cc: Christoph Hellwig <hch@lst.de>
    Cc: Josef Bacik <josef@toxicpanda.com>
    Signed-off-by: 's avatarMing Lei <ming.lei@redhat.com>
    Signed-off-by: 's avatarJens Axboe <axboe@kernel.dk>
    cc56694f
blk-rq-qos.c 6.3 KB