diff --git a/rules.d/40-elevator.rules b/rules.d/40-elevator.rules new file mode 100644 index 0000000000..dbe8fc81a4 --- /dev/null +++ b/rules.d/40-elevator.rules @@ -0,0 +1,20 @@ +# We aren't adding devices skip the elevator check +ACTION!="add", GOTO="sched_out" + +SUBSYSTEM!="block", GOTO="sched_out" +ENV{DEVTYPE}!="disk", GOTO="sched_out" + +# Technically, dm-multipath can be configured to use an I/O scheduler. +# However, there are races between the 'add' uevent and the linking in +# of the queue/scheduler sysfs file. For now, just skip dm- devices. +KERNEL=="dm-*|md*", GOTO="sched_out" + +# Skip bio-based devices, which don't support an I/O scheduler. +ATTR{queue/scheduler}=="none", GOTO="sched_out" + +# If elevator= is specified on the kernel command line, change the +# scheduler to the one specified. +IMPORT{cmdline}="elevator" +ENV{elevator}!="", ATTR{queue/scheduler}="$env{elevator}" + +LABEL="sched_out" \ No newline at end of file diff --git a/rules.d/meson.build b/rules.d/meson.build index edf419f449..2b57322a12 100644 --- a/rules.d/meson.build +++ b/rules.d/meson.build @@ -8,6 +8,7 @@ rules = [ [files('40-redhat-hotplug.rules', '40-redhat-s390.rules', '40-redhat.rules', + '40-elevator.rules', '60-autosuspend.rules', '60-block.rules', '60-cdrom_id.rules',