Re: btrfs-progs 4.4 re-balance of RAID6 is very slow / limited to one cpu core?

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Hey btrfs-folks,


I did a bit of digging using "perf":


1)
 * "perf stat -B -p 3933 sleep 60"
 * "perf stat -e 'btrfs:*' -a sleep 60"
 -> http://fpaste.org/320718/10016145/



2)
 * perf record -e block:block_rq_issue -ag" for about 30 seconds:
 -> http://fpaste.org/320719/51101751/raw/


3)
* perf top
 -> http://fpaste.org/320720/45511028/






Regards

Christian
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