On Thu, Jan 24, 2019 at 09:31:43AM -0500, Josef Bacik wrote: > Previously callers to btrfs_end_transaction_throttle() would commit the > transaction if there wasn't enough delayed refs space. This happens in > relocation, and if the fs is relatively empty we'll run out of delayed > refs space basically immediately, so we'll just be stuck in this loop of > committing the transaction over and over again. > > This code existed because we didn't have a good feedback mechanism for > running delayed refs, but with the delayed refs rsv we do now. Delete > this throttling code and let the btrfs_start_transaction() in relocation > deal with putting pressure on the delayed refs infrastructure. With > this patch we no longer take 5 minutes to balance a metadata only fs. > > Signed-off-by: Josef Bacik <jo...@toxicpanda.com>
For the record, this has been merged to 5.0-rc5
