| Bug ID | 1063638 |
|---|---|
| Summary | btrfs balance renders system unresponsive and eventually even kills WiFi when quota is enabled - review I/O scheduling parameters of btrfsmaintenance |
| Classification | openSUSE |
| Product | openSUSE Tumbleweed |
| Version | Current |
| Hardware | Other |
| OS | Other |
| Status | NEW |
| Severity | Major |
| Priority | P5 - None |
| Component | Basesystem |
| Assignee | bnc-team-screening@forge.provo.novell.com |
| Reporter | okurz@suse.com |
| QA Contact | qa-bugs@suse.de |
| CC | Antoine.Saroufim@gmail.com, aschnell@suse.com, auxsvr@gmail.com, dmitry@roshchin.org, dsterba@suse.com, ecsos@schirra.net, enadolski@suse.com, fcrozat@suse.com, fliu@suse.com, friedhelm.stappert@web.de, guenther@mpanrw.de, gweberbh@gmail.com, hannsj_uhl@de.ibm.com, harald.achitz@gmail.com, ingo.goeppert+suse@mailbox.org, jeffm@suse.com, kdejaeger@gmail.com, lnussel@suse.com, lpechacek@suse.com, ndcunliffe@gmail.com, okurz@suse.com, ortsacs@yahoo.es, rgoldwyn@suse.com, richard@nod.at, ronisbr@gmail.com, slindomansilla@suse.com, suse@bugs.jan.ritzerfeld.org, sven.heithecker@web.de, t.rother@netzwissen.de, tneo@gmx.com, ulrich.hobelmann+suse@gmail.com |
| Depends on | 1017461 |
| Found By | --- |
| Blocker | --- |
## Observation +++ This bug was initially created as a clone of Bug #1017461 +++ The first part of fixes have been done in bug 1017461 but it seems the btrfs maintenance tasks can still have a significant impact on system responsiveness. Running the btrfs maintenance jobs, e.g. * /etc/cron.monthly/btrfs-scrub * /etc/cron.weekly/btrfs-balance * /etc/cron.weekly/btrfs-trim can make the clock with seconds displayed stop for some seconds or the mouse cursor to get stuck for seconds ## Reproducible * Somehow cause lot of "dirty" data that needs balancing/scrubbing * Run the cron jobs * Observe the system responsiveness is hindered ## Expected result Interactive use of a machine should not be impacted ## Suggestion It looks like /usr/share/btrfsmaintenance/btrfs-scrub.sh checks for the variable "$BTRFS_SCRUB_PRIORITY" equalling "normal" from /etc/sysconfig/btrfsmaintenance but this is set to "idle" for me in the config file which causes that no I/O scheduling parameters are forwarded to the call of scrub at all which does not seem to make sense to me. Should it set `-c 3` for idle or `-c 2 -n 7` for best-effort prio 7 instead?