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| author | Keith Busch <keith.busch@intel.com> | 2018-06-30 01:50:03 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-07-24 16:55:48 +0300 |
| commit | 6268953e8977a23ca7512a2921e82a5d9252ec01 (patch) | |
| tree | 069eabf096b12e5d72844ebe9a6c9911d3eefdda /drivers/nvme/host/trace.c | |
| parent | b80a55e246a1b817cb254d79d077f364a2419578 (diff) | |
| download | linux-6268953e8977a23ca7512a2921e82a5d9252ec01.tar.xz | |
nvme: add disk name to trace events
This will print the disk name to the nvme event trace for io requests so
a user can better distinguish traffic to different disks. This can be used
to create disk based filters. For example, to see only nvme0n2 traffic:
echo "disk == \"nvme0n2\"" > /sys/kernel/debug/tracing/events/nvme/filter
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
[hch: turned __assign_disk_name into an inline function]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/host/trace.c')
| -rw-r--r-- | drivers/nvme/host/trace.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c index 41944bbef835..25b0e310f4a8 100644 --- a/drivers/nvme/host/trace.c +++ b/drivers/nvme/host/trace.c @@ -128,3 +128,14 @@ const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p, return nvme_trace_common(p, cdw10); } } + +const char *nvme_trace_disk_name(struct trace_seq *p, char *name) +{ + const char *ret = trace_seq_buffer_ptr(p); + + if (*name) + trace_seq_printf(p, "disk=%s, ", name); + trace_seq_putc(p, 0); + + return ret; +} |