From aeb9b211849621f592288ed5ad694de9eeaae87a Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 25 Aug 2011 14:43:08 +1000 Subject: [PATCH] md: ensure changes to 'write-mostly' are reflected in metadata. The 'write-mostly' flag can be changed through sysfs. With 0.90 metadata, those changes are reflected in the metadata. For 1.x metadata, they aren't. So fix super_1_sync to record 'write-mostly' status. Signed-off-by: NeilBrown --- drivers/md/md.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 1cd9bfb..9a88023 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1738,6 +1738,11 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) sb->level = cpu_to_le32(mddev->level); sb->layout = cpu_to_le32(mddev->layout); + if (test_bit(WriteMostly, &rdev->flags)) + sb->devflags |= WriteMostly1; + else + sb->devflags &= ~WriteMostly1; + if (mddev->bitmap && mddev->bitmap_info.file == NULL) { sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset); sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); -- 2.7.4