From 52efff53eb616bf8eddfde8922c4845aeaca2156 Mon Sep 17 00:00:00 2001
From: Donald Buczek <buczek@molgen.mpg.de>
Date: Tue, 18 Jan 2022 15:03:38 +0100
Subject: [PATCH] Add udev rule to select I/O scheduler

Change all block devices which can have a scheduler to BFQ.

Test for existing scheduler (which might be "none") to avoid an ugly
message in the journal log when we try to set a scheduler to a block
device which can't have one (e.g. a partition).
---
 install.sh                                        | 2 ++
 misc_etc_files/udev/rules.d/10-ioschedulers.rules | 1 +
 2 files changed, 3 insertions(+)
 create mode 100644 misc_etc_files/udev/rules.d/10-ioschedulers.rules

diff --git a/install.sh b/install.sh
index 236370a..89eb470 100755
--- a/install.sh
+++ b/install.sh
@@ -237,6 +237,8 @@ install_data mxproxmox/proxmox-backup.timer               "$DESTDIR$systemdunitd
 install_exec kill-exuser/kill-exuser                      "$DESTDIR$usr_sbindir/kill-exuser"
 install_data kill-exuser/kill-exuser.service              "$DESTDIR$systemdunitdir/kill-exuser.service"
 install_data kill-exuser/kill-exuser.timer                "$DESTDIR$systemdunitdir/kill-exuser.timer"
+install_data misc_etc_files/udev/rules.d/10-ioschedulers.rules \
+                                                          "$DESTIDIR$sysconfdir/udev/rules.d/10-ioschedulers.rules"
 install_data slowio/slowio.slice                          "$DESTDIR$systemdunitdir/slowio.slice"
 install_exec slowio/slowio-mem-control                    "$DESTDIR$sysconfdir/systemd/system-generators/slowio-mem-control"
 install_exec slowio/slowio                                "$DESTDIR$usr_sbindir/slowio"
diff --git a/misc_etc_files/udev/rules.d/10-ioschedulers.rules b/misc_etc_files/udev/rules.d/10-ioschedulers.rules
new file mode 100644
index 0000000..0b7293c
--- /dev/null
+++ b/misc_etc_files/udev/rules.d/10-ioschedulers.rules
@@ -0,0 +1 @@
+SUBSYSTEM=="block", ATTR{queue/scheduler}=="?*", ATTR{queue/scheduler}="bfq"