[ck]cgroup2 io weight 没有效果

各位同仁, 我看到cgroup2中有io.weight 和 io.bfq.weight，区别是什么? 我的理解是为了控制兄弟group在父group下的IO权重，我在如下版本测试了下，好像结果不太对，谁能指点一下，拜谢！ # uname -a Linux localhost.localdomain 4.19.91-26.an8.x86_64 #1 SMP Tue May 24 13:10:09 CST 2022 x86_64 x86_64 x86_64 GNU/Linux 我的测试脚本： #change to cgroup2 by adding cgroup_no_v1=all into grub param mkdir -p /aaa/cg2 mkdir -p /aaa/data2 mount -t cgroup2 nodev /aaa/cg2 mount /dev/sdb1 /aaag/data2/ echo bfq > /sys/block/vdb/queue/scheduler #做或不做 mkdir /aaa/cg2/test echo "+io +memory" > /aaa/cg2/cgroup.subtree_control echo "+io +memory" > /aaa/cg2/test/cgroup.subtree_control cat /aaa/cg2/test/cgroup.controllers echo "8:16 wbps=10485760" > /aaa/cg2/test/io.max echo $$ > /aaa/cg2/test/cgroup.procs mkdir -p /aaa/cg2/test/dd1 mkdir -p /aaa/cg2/test/dd2 echo 200 > /aaa/cg2/test/dd1/io.weight #echo 200 > /aaa/cg2/test/dd1/io.bfq.weight #两个选项都试了 #在另外2个终端执行如下的2个测试: echo $$ > /aaa/cg2/test/dd1/cgroup.procs dd if=/dev/zero of=/aaa/data2/ddfile1 bs=128M count=1 echo $$ > /aaa/cg2/test/dd2/cgroup.procs dd if=/dev/zero of=/aaa/data2/ddfile2 bs=128M count=1 我得到了两个 500K+, 而不是期望的300K+ and 600K！