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author | NeilBrown <neilb@suse.de> | 2006-01-06 11:21:36 +0300 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 19:34:10 +0300 |
commit | 88202a0c84e1951d6630d1d557d4801a8cc5b5ef (patch) | |
tree | 5a1aadc008de1ee68f40a4bb667157f248211230 /Documentation/md.txt | |
parent | 6d7ff7380b2e28c2807da3bf9fa614d91d15bacf (diff) | |
download | linux-88202a0c84e1951d6630d1d557d4801a8cc5b5ef.tar.xz |
[PATCH] md: allow sync-speed to be controlled per-device
Also export current (average) speed and status in sysfs.
Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/md.txt')
-rw-r--r-- | Documentation/md.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt index b8d172b254f7..03a13c462cf2 100644 --- a/Documentation/md.txt +++ b/Documentation/md.txt @@ -207,6 +207,28 @@ All md devices contain: available. It will then appear at md/dev-XXX (depending on the name of the device) and further configuration is then possible. + sync_speed_min + sync_speed_max + This are similar to /proc/sys/dev/raid/speed_limit_{min,max} + however they only apply to the particular array. + If no value has been written to these, of if the word 'system' + is written, then the system-wide value is used. If a value, + in kibibytes-per-second is written, then it is used. + When the files are read, they show the currently active value + followed by "(local)" or "(system)" depending on whether it is + a locally set or system-wide value. + + sync_completed + This shows the number of sectors that have been completed of + whatever the current sync_action is, followed by the number of + sectors in total that could need to be processed. The two + numbers are separated by a '/' thus effectively showing one + value, a fraction of the process that is complete. + + sync_speed + This shows the current actual speed, in K/sec, of the current + sync_action. It is averaged over the last 30 seconds. + As component devices are added to an md array, they appear in the 'md' directory as new directories named |