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md/bitmap: make sure reshape request are reflected in superblock. 

As a reshape may change the sync_size and/or chunk_size, we need
to update these whenever we write out the bitmap superblock.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-05-22 13:55:26 +10:00
parent d60b479d17
commit b81a040481
1 changed files with 3 additions and 0 deletions
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3
drivers/md/bitmap.c
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@ -420,6 +420,9 @@ void bitmap_update_sb(struct bitmap *bitmap)
/* Just in case these have been changed via sysfs: */
sb->daemon_sleep = cpu_to_le32(bitmap->mddev->bitmap_info.daemon_sleep/HZ);
sb->write_behind = cpu_to_le32(bitmap->mddev->bitmap_info.max_write_behind);
/* This might have been changed by a reshape */
sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);
sb->chunksize = cpu_to_le32(bitmap->mddev->bitmap_info.chunksize);
kunmap_atomic(sb);
write_page(bitmap, bitmap->storage.sb_page, 1);
}