[PATCH] md: make sure raid5/raid6 resync uses correct 'max_sectors'

The default resync_max_sector is set to "mddev->size << 1".  If the
raid-personality-module updates mddev->size, it must update
resync_max_sectors too.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 4698d5f..43f231a 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1653,6 +1653,7 @@ static int run (mddev_t *mddev)
 
        /* device size must be a multiple of chunk size */
        mddev->size &= ~(mddev->chunk_size/1024 -1);
+       mddev->resync_max_sectors = mddev->size << 1;
 
        if (!conf->chunk_size || conf->chunk_size % 4) {
                printk(KERN_ERR "raid5: invalid chunk size %d for %s\n",

diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index f5ee168..495dee1 100644 (file)
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -1813,6 +1813,7 @@ static int run (mddev_t *mddev)
 
        /* device size must be a multiple of chunk size */
        mddev->size &= ~(mddev->chunk_size/1024 -1);
+       mddev->resync_max_sectors = mddev->size << 1;
 
        if (conf->raid_disks < 4) {
                printk(KERN_ERR "raid6: not enough configured devices for %s (%d, minimum 4)\n",