diff options
author | David Sterba <dsterba@suse.com> | 2016-12-08 19:21:28 +0100 |
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committer | David Sterba <dsterba@suse.com> | 2016-12-14 15:06:36 +0100 |
commit | b67e9a1b132c98a2e31df9e8ae79273a8531ba6f (patch) | |
tree | 95ca7036539ac3ac28ff62cda3d0a08434417a32 | |
parent | 01bafdbc90452a17a9de6095fcdf0a9adca98dd2 (diff) |
btrfs-progs: docs: update dev stats help and manual page
Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r-- | Documentation/btrfs-device.asciidoc | 5 | ||||
-rw-r--r-- | cmds-device.c | 6 |
2 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/btrfs-device.asciidoc b/Documentation/btrfs-device.asciidoc index 193e2734..1e3b3a39 100644 --- a/Documentation/btrfs-device.asciidoc +++ b/Documentation/btrfs-device.asciidoc @@ -100,8 +100,9 @@ prior scanning. See the mount option 'device'. *stats* [-zs] <path>|<device>:: Read and print the device IO error statistics for all devices of the given -filesystem identified by <path> or for a single <device>. See section *DEVICE -STATS* for more information. +filesystem identified by <path> or for a single <device>. The filesystem must +be mounted. See section *DEVICE STATS* for more information about the reported +statistics and the meaning. + `Options` + diff --git a/cmds-device.c b/cmds-device.c index ba0e4368..3e053d9e 100644 --- a/cmds-device.c +++ b/cmds-device.c @@ -372,8 +372,10 @@ out: } static const char * const cmd_device_stats_usage[] = { - "btrfs device stats [-z] <path>|<device>", - "Show current device IO stats.", + "btrfs device stats [options] <path>|<device>", + "Show device IO error statistics", + "Show device IO error statistics for all devices of the given filesystem", + "identified by PATH or DEVICE. The filesystem must be mounted.", "", "-z|--reset show current stats and reset values to zero", "-s return non-zero if any stat counter is not zero", |