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The sysfs attribute 'resync_start' (known internally as recovery_cp), records where a resync is up to. A value of 0 means the array is not known to be in-sync at all. A value of MaxSector means the array is believed to be fully in-sync. When the size of member devices of an array (RAID1,RAID4/5/6) is increased, the array can be increased to match. This process sets resync_start to the old end-of-device offset so that the new part of the array gets resynced. However with RAID1 (and RAID6) a resync is not technically necessary and may be undesirable. So it would be good if the implied resync after the array is resized could be avoided. So: change 'resync_start' so the value can be changed while the array is active, and as a precaution only allow it to be changed while resync/recovery is 'frozen'. Changing it once resync has started is not going to be useful anyway. This allows the array to be resized without a resync by: write 'frozen' to 'sync_action' write new size to 'component_size' (this will set resync_start) write 'none' to 'resync_start' write 'idle' to 'sync_action'. Also slightly improve some tests on recovery_cp when resizing raid1/raid5. Now that an arbitrary value could be set we should be more careful in our tests. Signed-off-by: NeilBrown <neilb@suse.de> |
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.. | ||
bitmap.c | ||
bitmap.h | ||
dm-bio-record.h | ||
dm-crypt.c | ||
dm-delay.c | ||
dm-exception-store.c | ||
dm-exception-store.h | ||
dm-flakey.c | ||
dm-io.c | ||
dm-ioctl.c | ||
dm-kcopyd.c | ||
dm-linear.c | ||
dm-log-userspace-base.c | ||
dm-log-userspace-transfer.c | ||
dm-log-userspace-transfer.h | ||
dm-log.c | ||
dm-mpath.c | ||
dm-mpath.h | ||
dm-path-selector.c | ||
dm-path-selector.h | ||
dm-queue-length.c | ||
dm-raid.c | ||
dm-raid1.c | ||
dm-region-hash.c | ||
dm-round-robin.c | ||
dm-service-time.c | ||
dm-snap-persistent.c | ||
dm-snap-transient.c | ||
dm-snap.c | ||
dm-stripe.c | ||
dm-sysfs.c | ||
dm-table.c | ||
dm-target.c | ||
dm-uevent.c | ||
dm-uevent.h | ||
dm-zero.c | ||
dm.c | ||
dm.h | ||
faulty.c | ||
Kconfig | ||
linear.c | ||
linear.h | ||
Makefile | ||
md.c | ||
md.h | ||
multipath.c | ||
multipath.h | ||
raid1.c | ||
raid1.h | ||
raid5.c | ||
raid5.h | ||
raid10.c | ||
raid10.h | ||
raid0.c | ||
raid0.h |