The offset is wrong in bitmap_storage_alloc, we should set it like below in bitmap_init_from_disk(). node_offset = bitmap->cluster_slot * (DIV_ROUND_UP(store->bytes, PAGE_SIZE)); Because 'offset' is only assigned to 'page->index' and that is usually over-written by read_sb_page. So it does not cause problem in general, but it still need to be fixed. Reviewed-by: NeilBrown <neilb@xxxxxxxx> Signed-off-by: Guoqing Jiang <gqjiang@xxxxxxxx> --- drivers/md/bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 2e198f3..bdae67a 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -759,7 +759,7 @@ static int bitmap_storage_alloc(struct bitmap_storage *store, bytes += sizeof(bitmap_super_t); num_pages = DIV_ROUND_UP(bytes, PAGE_SIZE); - offset = slot_number * (num_pages - 1); + offset = slot_number * num_pages; store->filemap = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL); -- 2.6.6 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
