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SubjectRE: nvme may get timeout from dd when using different non-prefetch mmio outbound/ranges
Date
> [   81.634065][    T7] nvme nvme0: Shutdown timeout set to 8 seconds
> [ 81.674332][ T7] nvme nvme0: 1/0/0 default/read/poll queues
> [ 112.168136][ T256] nvme nvme0: I/O 12 QID 1 timeout, disable controller

I/O 12 QID 1 is nvme_cmd_write, reproduce after rebooting and using ftrace:

# dmesg | grep QID
[ 99.456260] nvme nvme0: I/O 128 QID 1 timeout, disable controller
# grep "qid=1" /sys/kernel/tracing/trace | egrep "cmdid=128\b"
kworker/0:1H-65 [000] .... 68.987492: nvme_setup_cmd: nvme0: disk=nvme0n1, qid=1, cmdid=128, nsid=1, flags=0x0, meta=0x0, cmd=(nvme_cmd_write slba=216856, len=1015, ctrl=0x0, dsmgmt=0, reftag=0)
<idle>-0 [001] ..s1 99.475164: nvme_complete_rq: nvme0: disk=nvme0n1, qid=1, cmdid=128, res=0x0, retries=1, flags=0x1, status=0x371

Regards,
Li

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