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| author | Mikulas Patocka <mpatocka@redhat.com> | 2015-08-18 22:26:16 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-08-18 23:20:03 +0200 |
| commit | bd49784fd1e8f42c7600fbfa206361324857f373 (patch) | |
| tree | 238d475c49cc50ba1543e6692553a6a0f3b384e8 /Documentation/device-mapper | |
| parent | dm thin: optimize async discard submission (diff) | |
| download | linux-bd49784fd1e8f42c7600fbfa206361324857f373.tar.xz linux-bd49784fd1e8f42c7600fbfa206361324857f373.zip | |
dm stats: report precise_timestamps and histogram in @stats_list output
If the user selected the precise_timestamps or histogram options, report
it in the @stats_list message output.
If the user didn't select these options, no extra tokens are reported,
thus it is backward compatible with old software that doesn't know about
precise timestamps and histogram.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 4.2
Diffstat (limited to 'Documentation/device-mapper')
| -rw-r--r-- | Documentation/device-mapper/statistics.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/device-mapper/statistics.txt b/Documentation/device-mapper/statistics.txt index 4919b2dfd1b3..6f5ef944ca4c 100644 --- a/Documentation/device-mapper/statistics.txt +++ b/Documentation/device-mapper/statistics.txt @@ -121,6 +121,10 @@ Messages Output format: <region_id>: <start_sector>+<length> <step> <program_id> <aux_data> + precise_timestamps histogram:n1,n2,n3,... + + The strings "precise_timestamps" and "histogram" are printed only + if they were specified when creating the region. @stats_print <region_id> [<starting_line> <number_of_lines>] |