(Sorry for the garbled message due to my mistaken the configuration of mutt)

I'm the college of the reporter and I would like to provide more
information.

The code in 5.15-rc6 in "blk-throttle.c" around line 791 is written as
below:

	/*
	 * Previous slice has expired. We must have trimmed it after
	 * last
	 * bio dispatch. That means since start of last slice, we never
	 * used
	 * that bandwidth. Do try to make use of that bandwidth while
	 * giving
	 * credit.
	 */
	if (time_after_eq(start, tg->slice_start[rw]))
		tg->slice_start[rw] = start;

I think this piece of code presumes all jiffies values are greater than
0, which is the initial value assigned when kzalloc-ing throtl_grp. It
fails on 32-bit linux for the first 5 minutes after booting, since the
jiffies value then will be less than 0.