On 1/25/21 9:24 PM, Naohiro Aota wrote:
Conventional zones do not have a write pointer, so we cannot use it to determine the allocation offset if a block group contains a conventional zone. But instead, we can consider the end of the last allocated extent in the block group as an allocation offset. For new block group, we cannot calculate the allocation offset by consulting the extent tree, because it can cause deadlock by taking extent buffer lock after chunk mutex (which is already taken in btrfs_make_block_group()). Since it is a new block group, we can simply set the allocation offset to 0, anyway. Signed-off-by: Naohiro Aota <naohiro.aota@xxxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx> Thanks, Josef
