From 223ea50950f97ed4e67311dfcffed7ffc27a7cd3 Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>

Date: Wed, 14 Aug 2019 15:57:42 +0200

Subject: [PATCH] udev: use bfq as the default scheduler

As requested in https://bugzilla.redhat.com/show_bug.cgi?id=1738828.

Test results are that bfq seems to behave better and more consistently on

typical hardware. The kernel does not have a configuration option to set

the default scheduler, and it currently needs to be set by userspace.

See the bug for more discussion and links.

---

 rules.d/60-block-scheduler.rules | 5 +++++

 rules.d/meson.build              | 1 +

 2 files changed, 6 insertions(+)

 create mode 100644 rules.d/60-block-scheduler.rules

diff --git a/rules.d/60-block-scheduler.rules b/rules.d/60-block-scheduler.rules

new file mode 100644

index 0000000000..480b941761

--- /dev/null

+++ b/rules.d/60-block-scheduler.rules

@@ -0,0 +1,6 @@

+# do not edit this file, it will be overwritten on update

+

+ACTION=="add", SUBSYSTEM=="block", \

+  KERNEL=="mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|sd*[!0-9]|sr*", \

+  ENV{DEVTYPE}=="disk", \

+  ATTR{queue/scheduler}="bfq"

diff --git a/rules.d/meson.build b/rules.d/meson.build

index ca4445d774..38d6aa6970 100644

--- a/rules.d/meson.build

+++ b/rules.d/meson.build

@@ -3,6 +3,7 @@

 rules = files('''

         60-autosuspend.rules

         60-block.rules

+        60-block-scheduler.rules

         60-cdrom_id.rules

         60-drm.rules

         60-evdev.rules