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imsm: FIX: Chunk size migration problem 

When chunk size migration occurs (e.g. 128k->4k) first checkpoint cannot
be set in md due to too small step. Correct migration record initialization
to allow whole copy area usage and increase migration checkpoint step.

Signed-off-by: Adam Kwolek <adam.kwolek@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Adam Kwolek 2012-02-07 15:03:51 +01:00 committed by NeilBrown
parent 78340e26a5
commit e1742195ff
1 changed files with 2 additions and 1 deletions
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super-intel.c
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@ -8913,7 +8913,8 @@ void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev,
migr_rec->dest_depth_per_unit = GEN_MIGR_AREA_SIZE /
max(map_dest->blocks_per_strip, map_src->blocks_per_strip);
migr_rec->dest_depth_per_unit *= map_dest->blocks_per_strip;
migr_rec->dest_depth_per_unit *=
max(map_dest->blocks_per_strip, map_src->blocks_per_strip);
new_data_disks = imsm_num_data_members(dev, MAP_0);
migr_rec->blocks_per_unit =
__cpu_to_le32(migr_rec->dest_depth_per_unit * new_data_disks);