Patch "dm stats: report precise_timestamps and histogram in" has been added to the 4.2-stable tree

This is a note to let you know that I've just added the patch titled

dm stats: report precise_timestamps and histogram in

to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
dm-stats-report-precise_timestamps-and-histogram-in.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Mikulas Patocka <[email protected]>
Date: Tue, 18 Aug 2015 16:26:16 -0400
Subject: dm stats: report precise_timestamps and histogram in
@stats_list output

From: Mikulas Patocka <[email protected]>

commit bd49784fd1e8f42c7600fbfa206361324857f373 upstream.

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.

---
 Documentation/device-mapper/statistics.txt |    4 ++++
 drivers/md/dm-stats.c                      |   14 +++++++++++++-
 include/uapi/linux/dm-ioctl.h              |    4 ++--
 3 files changed, 19 insertions(+), 3 deletions(-)

@@ -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>]
 

@@ -457,12 +457,24 @@ static int dm_stats_list(struct dm_stats
 	list_for_each_entry(s, &stats->list, list_entry) {
 		if (!program || !strcmp(program, s->program_id)) {
 			len = s->end - s->start;
-			DMEMIT("%d: %llu+%llu %llu %s %s\n", s->id,
+			DMEMIT("%d: %llu+%llu %llu %s %s", s->id,
 				(unsigned long long)s->start,
 				(unsigned long long)len,
 				(unsigned long long)s->step,
 				s->program_id,
 				s->aux_data);
+			if (s->stat_flags & STAT_PRECISE_TIMESTAMPS)
+				DMEMIT(" precise_timestamps");
+			if (s->n_histogram_entries) {
+				unsigned i;
+				DMEMIT(" histogram:");
+				for (i = 0; i < s->n_histogram_entries; i++) {
+					if (i)
+						DMEMIT(",");
+					DMEMIT("%llu", s->histogram_boundaries[i]);
+				}
+			}
+			DMEMIT("\n");
 		}
 	}
 	mutex_unlock(&stats->mutex);

@@ -267,9 +267,9 @@ enum {
 #define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
 
 #define DM_VERSION_MAJOR	4
-#define DM_VERSION_MINOR	32
+#define DM_VERSION_MINOR	33
 #define DM_VERSION_PATCHLEVEL	0
-#define DM_VERSION_EXTRA	"-ioctl (2015-6-26)"
+#define DM_VERSION_EXTRA	"-ioctl (2015-8-18)"
 
 /* Status bits */
 #define DM_READONLY_FLAG	(1 << 0) /* In/Out */

Patches currently in stable-queue which might be from [email protected] are

queue-4.2/dm-stats-report-precise_timestamps-and-histogram-in.patch queue-4.2/hpfs-update-ctime-and-mtime-on-directory-modification.patch