There are lots of direct access to .bi_vcnt & .bi_io_vec
of bio, and it isn't ready to support multipage bvecs
for BTRFS, so set NO_MP for these request queues.
Signed-off-by: Ming Lei <tom.leim...@gmail.com>
---
fs/btrfs/volumes.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 71a60cc01451..2e7237a3b84d 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1011,6 +1011,9 @@ static int __btrfs_open_devices(struct btrfs_fs_devices
*fs_devices,
if (blk_queue_discard(q))
device->can_discard = 1;
+ /* BTRFS isn't ready to support multipage bvecs */
+ set_bit(QUEUE_FLAG_NO_MP, &q->queue_flags);
+
device->bdev = bdev;
device->in_fs_metadata = 0;
device->mode = flags;
--
2.7.4
