diff options
| author | NeilBrown <neilb@suse.de> | 2006-03-27 01:18:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-27 08:45:01 -0800 |
| commit | ad01c9e3752f4ba4f3d99c89b7370fa4983a25b5 (patch) | |
| tree | 856868aa97332d6d15d4cad412e0ebe3576bb571 /drivers/md/raid6main.c | |
| parent | b55e6bfcd23cb2f7249095050c649f7aea813f9f (diff) | |
[PATCH] md: Allow stripes to be expanded in preparation for expanding an array
Before a RAID-5 can be expanded, we need to be able to expand the stripe-cache
data structure.
This requires allocating new stripes in a new kmem_cache. If this succeeds,
we copy cache pages over and release the old stripes and kmem_cache.
We then allocate new pages. If that fails, we leave the stripe cache at it's
new size. It isn't worth the effort to shrink it back again.
Unfortuanately this means we need two kmem_cache names as we, for a short
period of time, we have two kmem_caches. So they are raid5/%s and
raid5/%s-alt
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/raid6main.c')
| -rw-r--r-- | drivers/md/raid6main.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c index c7632f6cc487..6df4930fddec 100644 --- a/drivers/md/raid6main.c +++ b/drivers/md/raid6main.c @@ -331,9 +331,9 @@ static int grow_stripes(raid6_conf_t *conf, int num) kmem_cache_t *sc; int devs = conf->raid_disks; - sprintf(conf->cache_name, "raid6/%s", mdname(conf->mddev)); + sprintf(conf->cache_name[0], "raid6/%s", mdname(conf->mddev)); - sc = kmem_cache_create(conf->cache_name, + sc = kmem_cache_create(conf->cache_name[0], sizeof(struct stripe_head)+(devs-1)*sizeof(struct r5dev), 0, 0, NULL, NULL); if (!sc) |