mdadm/0079-mdadm-tests-test-enhance.patch

From 6e8af9475cf0ac22f7ac167040dbf92fbfdd97ab Mon Sep 17 00:00:00 2001
From: Xiao Ni <xni@redhat.com>
Date: Wed, 22 May 2024 16:50:41 +0800
Subject: [PATCH 079/157] mdadm/tests: test enhance

There are two changes.
First, if md module is not loaded, it gives error when reading
speed_limit_max. So read the value after loading md module which
is done in do_setup

Second, sometimes the test reports error sync action doesn't
happen. But dmesg shows sync action is done. So limit the sync
speed before test. It doesn't affect the test run time. Because
check wait sets the max speed before waiting sync action. And
recording speed_limit_max/min in do_setup.

Fixes: 4c12714d1ca0 ('test: run tests on system level mdadm')
Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
---
 test          | 10 +++++-----
 tests/func.sh | 26 +++++++++++++++++++++++---
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/test b/test
index 338c2db4..ff403293 100755
--- a/test
+++ b/test
@@ -6,7 +6,10 @@ targetdir="/var/tmp"
 logdir="$targetdir"
 config=/tmp/mdadm.conf
 testdir=$PWD/tests
-system_speed_limit=`cat /proc/sys/dev/raid/speed_limit_max`
+system_speed_limit_max=0
+system_speed_limit_min=0
+test_speed_limit_min=100
+test_speed_limit_max=500
 devlist=
 
 savelogs=0
@@ -39,10 +42,6 @@ ctrl_c() {
 	ctrl_c_error=1
 }
 
-restore_system_speed_limit() {
-	echo $system_speed_limit > /proc/sys/dev/raid/speed_limit_max
-}
-
 mdadm() {
 	rm -f $targetdir/stderr
 	case $* in
@@ -103,6 +102,7 @@ do_test() {
 		do_clean
 		# source script in a subshell, so it has access to our
 		# namespace, but cannot change it.
+		control_system_speed_limit
 		echo -ne "$_script... "
 		if ( set -ex ; . $_script ) &> $targetdir/log
 		then
diff --git a/tests/func.sh b/tests/func.sh
index b474442b..221cff15 100644
--- a/tests/func.sh
+++ b/tests/func.sh
@@ -136,6 +136,23 @@ check_env() {
 	fi
 }
 
+record_system_speed_limit() {
+	system_speed_limit_max=`cat /proc/sys/dev/raid/speed_limit_max`
+	system_speed_limit_min=`cat /proc/sys/dev/raid/speed_limit_min`
+}
+
+# To avoid sync action finishes before checking it, it needs to limit
+# the sync speed
+control_system_speed_limit() {
+	echo $test_speed_limit_min > /proc/sys/dev/raid/speed_limit_min
+	echo $test_speed_limit_max > /proc/sys/dev/raid/speed_limit_max
+}
+
+restore_system_speed_limit() {
+	echo $system_speed_limit_min > /proc/sys/dev/raid/speed_limit_max
+	echo $system_speed_limit_max > /proc/sys/dev/raid/speed_limit_max
+}
+
 do_setup() {
 	trap cleanup 0 1 3 15
 	trap ctrl_c 2
@@ -214,6 +231,7 @@ do_setup() {
 	ulimit -c unlimited
 	[ -f /proc/mdstat ] || modprobe md_mod
 	echo 0 > /sys/module/md_mod/parameters/start_ro
+	record_system_speed_limit
 }
 
 # check various things
@@ -265,15 +283,17 @@ check() {
 		fi
 	;;
 	wait )
-		p=`cat /proc/sys/dev/raid/speed_limit_max`
-		echo 2000000 > /proc/sys/dev/raid/speed_limit_max
+		min=`cat /proc/sys/dev/raid/speed_limit_min`
+		max=`cat /proc/sys/dev/raid/speed_limit_max`
+		echo 200000 > /proc/sys/dev/raid/speed_limit_max
 		sleep 0.1
 		while grep -Eq '(resync|recovery|reshape|check|repair) *=' /proc/mdstat ||
 			grep -v idle > /dev/null /sys/block/md*/md/sync_action
 		do
 			sleep 0.5
 		done
-		echo $p > /proc/sys/dev/raid/speed_limit_max
+		echo $min > /proc/sys/dev/raid/speed_limit_min
+		echo $max > /proc/sys/dev/raid/speed_limit_max
 	;;
 	state )
 		grep -sq "blocks.*\[$2\]\$" /proc/mdstat ||
-- 
2.41.0