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Export the disk name, queue id, sq_head, sq_tail to a trace event in
completion handling.
Usage example:
cd /sys/kernel/debug/tracing/events/nvme/nvme_sq
echo 'disk=="nvme1n1"' > filter
echo 1 > enable
cat /sys/kernel/debug/tracing/trace_pipe
Signed-off-by: yupeng <yupeng0921@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Keith Busch <keith.busch@intel.com>
[hch: slight formatting tweaks, use standard nvme tracepoint
conventions]
Signed-off-by: Christoph Hellwig <hch@lst.de>
wip
604c01d567