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NVMe loop hang during delelting controller - Coggle Diagram
NVMe loop hang during delelting controller
observation
request isn't done and waiting in blk_freeze_queue() in blk_cleanup_queue
about requests
flush
state is IDLE
MQ_INFLIGHT is set
->ref is 1
flush.seq is 0
RQF_FLUSH_SEQ
RQF_DONTPREP is set too
fq->flush_rq
write
FUA
flush.seq is 4
state is IDLE
RQF_FLUSH_SEQ
REQ_DRV
MPATH
related with nvme_failover_req?
which queue does these request stay?
flush queue
data_inflight is empty
both two queues have requests
queue isn't quiesced
request isn't re-queued to nvme loop LLD