tree 77003957b071e5728fefedd905bf6f8c348fb4b3
parent b4c4c7b8095298ff4ce20b40bf180ada070812d0
author NeilBrown <neilb@suse.de> 1172722313 -0800
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1172789616 -0800

[PATCH] md: add support for reshape of a raid6

i.e. one or more drives can be added and the array will re-stripe
while on-line.

Most of the interesting work was already done for raid5.  This just extends it
to raid6.

mdadm newer than 2.6 is needed for complete safety, however any version of
mdadm which support raid5 reshape will do a good enough job in almost all
cases (an 'echo repair > /sys/block/mdX/md/sync_action' is recommended after a
reshape that was aborted and had to be restarted with an such a version of
mdadm).

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>