https://bugzilla.kernel.org/show_bug.cgi?id=202859

--- Comment #9 from Lei Ming (tom.leim...@gmail.com) ---
>From the debugfs log, the blk-mq mapping is just one simple 1:N, all online 64
CPUs(128 all possible CPUs) are mapped to hw queue 0.

I don't understand why this issue doesn't happen after you reduce CPU number
to 24. Could you collect the following logs again after CPU number is reduced
to 24?

1) lscpu

2) (cd /sys/kernel/debug/block/sdb && find . -type f -exec grep -aH . {} \;)

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