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authorMikulas Patocka <mpatocka@redhat.com>2015-08-18 16:26:16 -0400
committerMike Snitzer <snitzer@redhat.com>2015-08-18 17:20:03 -0400
commitbd49784fd1e8f42c7600fbfa206361324857f373 (patch)
tree238d475c49cc50ba1543e6692553a6a0f3b384e8 /Documentation/device-mapper
parent84f8bd86cc8977c344df572169f7ec10b8188cfa (diff)
downloadlinux-bd49784fd1e8f42c7600fbfa206361324857f373.tar.bz2
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.txt4
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>]