From 1990fb757f6d275d807fcb48ad09f5fc7c947bc6 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..850b64540e

--- /dev/null

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

@@ -0,0 +1,5 @@

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

+

+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"

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

index 8d2878a36d..a3b395c9ce 100644

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

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

@@ -8,6 +8,7 @@ rules = [

         [files('60-autosuspend.rules',

                '60-block.rules',

                '60-cdrom_id.rules',

+               '60-block-scheduler.rules',

                '60-drm.rules',

                '60-evdev.rules',

                '60-fido-id.rules',

-- 

2.37.2