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btrfs-progs: docs: update dev stats help and manual page 

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2016-12-08 19:21:28 +01:00
parent 01bafdbc90
commit b67e9a1b13
2 changed files with 7 additions and 4 deletions
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5
Documentation/btrfs-device.asciidoc
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@ -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`
+

6
cmds-device.c
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@ -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",