Comment # 83 on bug 1063638 from Steven Susbauer

I run into this issue on my laptop, especially when resuming from standby.
Thankfully it does not take hours, but there are a few minutes when the machine
is mostly unusable. I have seen the suggestion to disable quotas, but other
than "reduced functionality" nobody has said what that actually does to snapper
- if the normal time-based cleanups are still enabled in the snapper config is
that enough? I've found the basic snapper space-aware cleanup info at
http://snapper.io/2016/05/18/space-aware-cleanup.html but it doesn't really
answer the question. This is an SSD machine running Leap 15.0 with plenty of
ram, and I don't think I do anything wild to create high numbers of snapshots.

Also, I'm not even sure why these operations were running right now, unless
it's related to the standby? It was only overnight. It seems btrfs-balance and
btrfs-scrub are running at the same time.

��� btrfs-balance.timer - Balance block groups on a btrfs filesystem
   Loaded: loaded (/usr/lib/systemd/system/btrfs-balance.timer; enabled;
vendor>
  Drop-In: /etc/systemd/system/btrfs-balance.timer.d
           ������schedule.conf
   Active: active (waiting) since Thu 2018-06-28 18:35:34 PDT; 2 days ago
  Trigger: Mon 2018-07-02 00:00:00 PDT; 8h left

��� btrfs-scrub.timer - Scrub btrfs filesystem, verify block checksums
   Loaded: loaded (/usr/lib/systemd/system/btrfs-scrub.timer; enabled; vendor
p>
  Drop-In: /etc/systemd/system/btrfs-scrub.timer.d
           ������schedule.conf
   Active: active (waiting) since Thu 2018-06-28 18:35:34 PDT; 2 days ago
  Trigger: Wed 2018-08-01 00:00:00 PDT; 4 weeks 2 days left


��� btrfs-balance.service - Balance block groups on a btrfs filesystem
   Loaded: loaded (/usr/lib/systemd/system/btrfs-balance.service; static;
vendo>
   Active: inactive (dead) since Sun 2018-07-01 14:30:56 PDT; 45min ago

��� btrfs-scrub.service - Scrub btrfs filesystem, verify block checksums
   Loaded: loaded (/usr/lib/systemd/system/btrfs-scrub.service; static; vendor
>
   Active: inactive (dead) since Sun 2018-07-01 14:31:13 PDT; 45min ago

Jul 01 14:29:16 thinkpad systemd[1]: Started Scrub btrfs filesystem, verify
block checksums.
Jul 01 14:29:16 thinkpad btrfs-scrub.sh[4644]: Running scrub on /
Jul 01 14:31:13 thinkpad btrfs-scrub.sh[4644]: scrub device
/dev/mapper/linux-root (id 1) done
Jul 01 14:31:13 thinkpad btrfs-scrub.sh[4644]:         scrub started at Sun Jul
 1 14:29:16 2018 and finished after 00:01:57
Jul 01 14:31:13 thinkpad btrfs-scrub.sh[4644]:         total bytes scrubbed:
8.58GiB with 0 errors