Comment # 61 on bug 1017461 from Libor Pechacek

(In reply to Richard Weinberger from comment #59)
> So, this issue should now be fixed by the following upstream commit?

It's only part of the fix. The soft lockups are prevented by d8422ba334f
(btrfs: backref: Fix soft lockup in __merge_refs function).

(In reply to Jan Ritzerfeld from comment #60)
> I updated the kernel and re-enabled quotas (not that easy).

Issuing `snapper setup-quota' not easy?

> And even meta
> data balancing still
> 1. takes 15 minutes while completely hogging 1 CPU using a laptop on battery
> (recipe for a disaster), and
> 2. frequently delays starting shell commands, causes severe WiFi packet
> loss, and locks up the system for several seconds.

Same here with Tumbleweed.