From: NeilBrown Date: Tue, 14 Apr 2009 06:28:34 +0000 (+1000) Subject: md: improve usefulness and accuracy of sysfs file md/sync_completed. X-Git-Tag: v2.6.30-rc3~41^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=acb180b0e335ad88acfed6c8a33e39c05b95dc49;p=pandora-kernel.git md: improve usefulness and accuracy of sysfs file md/sync_completed. The sync_completed file reports how much of a resync (or recovery or reshape) has been completed. However due to the possibility of out-of-order completion of writes, it is not certain to be accurate. We have an internal value - mddev->curr_resync_completed - which is an accurate value (though it might not always be quite so uptodate). So: - make curr_resync_completed be uptodate a little more often, particularly when raid5 reshape updates status in the metadata - report curr_resync_completed in the sysfs file - allow poll/select to report all updates to md/sync_completed. This makes sync_completed completed usable by any external metadata handler that wants to record this status information in its metadata. Signed-off-by: NeilBrown --- Reading git-diff-tree failed