Linux 7.2 regression - udev setting scheduler

Linux 7.2 regression - udev setting scheduler

[Reindl Harald]

the rules are in place since at least 2019 and with 7.2 now fire errors

Sep 11 15:30:55 testserver (udev-worker)[321]: sdb: 
/etc/udev/rules.d/80-mq-deadline.rules:1 
ATTR{queue/scheduler}="mq-deadline": Failed to write "mq-deadline" to 
sysfs attribute "queue/scheduler", ignoring: Device or resource busy
Sep 11 15:30:57 testserver (udev-worker)[462]: sdb: 
/usr/lib/udev/rules.d/60-block-scheduler.rules:3 
ATTR{queue/scheduler}="bfq": Failed to write "bfq" to sysfs attribute 
"queue/scheduler", ignoring: Device or resource busy
Sep 11 15:30:57 testserver (udev-worker)[462]: sdb: 
/etc/udev/rules.d/80-mq-deadline.rules:1 
ATTR{queue/scheduler}="mq-deadline": Failed to write "mq-deadline" to 
sysfs attribute "queue/scheduler", ignoring: Device or resource busy

[root@testserver:~]$ cat /etc/udev/rules.d/80-mq-deadline.rules
ACTION=="add|change", KERNEL=="sd[a-z]", ATTR{queue/scheduler}="mq-deadline"

[root@testserver:~]$ cat /usr/lib/udev/rules.d/60-block-scheduler.rules
ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", \
   KERNEL=="mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|sd*[!0-9]|sr*", \
   ATTR{queue/scheduler}="bfq"

[root@testserver:~]$ uname -a
Linux testserver.rhsoft.net 7.2.4-200.fc44.x86_64 #1 SMP PREEMPT_DYNAMIC 
Mon Sep  7 19:10:19 UTC 2026 x86_64 GNU/Linux