blk_mq_tagset_busy_iter is not safe that it could get stale request in tags->rqs[]. Use blk_mq_queue_tag_busy_iter here. Signed-off-by: Jianchao Wang <jianchao.w.wang@xxxxxxxxxx> --- block/blk-mq-debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index 7921573..7c4e771 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -442,8 +442,8 @@ static int hctx_busy_show(void *data, struct seq_file *m) struct blk_mq_hw_ctx *hctx = data; struct show_busy_params params = { .m = m, .hctx = hctx }; - blk_mq_tagset_busy_iter(hctx->queue->tag_set, hctx_show_busy_rq, - ¶ms); + blk_mq_queue_tag_busy_iter(hctx->queue, hctx_show_busy_rq, + ¶ms, true); return 0; } -- 2.7.4