openSUSE: Fixes for various problems

Unresponsive system

High kernel CPU usage caused by btrfs-balance

Bug reports: 1063638 and 1017461

May also be a fragmentation issue.

Symptoms

The system is intermittently unresponsive. When the system is unresponsive, there is often high disk usage and high kernel CPU usage. The system is unresponsive while btrfs-balance, btrfs-trim, or other automated filesystem maintenance is running.

Workaround

The bug is not present when btrfs quotas are disabled. Snapper's limits must not have ranges when quotas are disabled.

sudo btrfs quota disable / sudo snapper set-config QGROUP= NUMBER_LIMIT=10 NUMBER_LIMIT_IMPORTANT=10