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If qgroup tracking is out of sync, a rescan operation can be started. It iterates the complete extent tree and recalculates all qgroup tracking data. This is an expensive operation and should not be used unless required. A filesystem under rescan can still be umounted. The rescan continues on the next mount. Status information is provided with a separate ioctl while a rescan operation is in progress. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Signed-off-by: Josef Bacik <jbacik@fusionio.com> |
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