Messages in this thread | | | Date | Sat, 18 Dec 2021 13:57:15 -0500 | From | "Alex Xu (Hello71)" <> | Subject | very low IOPS due to "block: reduce kblockd_mod_delayed_work_on() CPU consumption" |
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Hi,
I recently noticed that between 6441998e2e and 9eaa88c703, I/O became much slower on my machine using ext4 on dm-crypt on NVMe with bfq scheduler. Checking iostat during heavy usage (find / -xdev and fstrim -v /), maximum IOPS had fallen from ~10000 to ~100. Reverting cb2ac2912a ("block: reduce kblockd_mod_delayed_work_on() CPU consumption") resolves the issue.
Thanks, Alex.
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