[PATCH] Btrfs: use larger limit for transition of logical to inode

[Liu Bo <bo.li.liu@oracle.com>]

This is the change of the kernel side.

Transition of logical to inode used to have a limit 4096 on inode container's
size, but the limit is not large enough for a data with a great many of refs,
so when resolving logical address, we can end up with
"ioctl ret=0, bytes_left=0, bytes_missing=19944, cnt=510, missed=2493"

This changes to regard 4096 as the lowest limit.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/ioctl.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9449b84..525915f 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3232,7 +3232,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
 		goto out;
 	}
 
-	size = min_t(u32, loi->size, 4096);
+	size = max_t(u32, loi->size, 4096);
 	inodes = init_data_container(size);
 	if (IS_ERR(inodes)) {
 		ret = PTR_ERR(inodes);
-- 
1.7.7.6