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| author |   yupeng <yupeng0921@gmail.com> | 2018-12-18 17:59:53 +0100 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2018-12-19 08:35:36 +0100 |
| commit | 604c01d567cb9ee7d19dc598272cb90ab6229a8a (patch) | |
| tree | 896081abe12f6fd5b12c79515dbc2b08457dc6f3 /drivers/nvme/host/trace.c | |
| parent | nvme-rdma: implement polling queue map (diff) | |
| download | linux-dev-604c01d567cb9ee7d19dc598272cb90ab6229a8a.tar.xz linux-dev-604c01d567cb9ee7d19dc598272cb90ab6229a8a.zip | |
nvme-pci: trace SQ status on completions
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
Diffstat (limited to 'drivers/nvme/host/trace.c')
| -rw-r--r-- | drivers/nvme/host/trace.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c index 25b0e310f4a8..5566dda3237a 100644 --- a/drivers/nvme/host/trace.c +++ b/drivers/nvme/host/trace.c @@ -139,3 +139,6 @@ const char *nvme_trace_disk_name(struct trace_seq *p, char *name) return ret; } +EXPORT_SYMBOL_GPL(nvme_trace_disk_name); + +EXPORT_TRACEPOINT_SYMBOL_GPL(nvme_sq); |