From 7dd6a5192d5dec03acb2490188f021f46460ec2d Mon Sep 17 00:00:00 2001
From: Uli Baum <xeji@cat3.de>
Date: Sat, 22 Sep 2018 12:29:10 +0200
Subject: [PATCH] nixos/tests/installer: stop udev queue before calling mdadm

In the swraid test, temporarily stop udev queue execution while
creating mdraid devices to prevent a race with udev, see
https://groups.google.com/forum/#!topic/scylladb-dev/u87yHgo3ylU
---
 nixos/tests/installer.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index dc8edeab4e6c..3f9fa0e6016c 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -531,8 +531,10 @@ in {
               "udevadm settle",
               "ls -l /dev/vda* >&2",
               "cat /proc/partitions >&2",
+              "udevadm control --stop-exec-queue",
               "mdadm --create --force /dev/md0 --metadata 1.2 --level=raid1 --raid-devices=2 /dev/vda5 /dev/vda6",
               "mdadm --create --force /dev/md1 --metadata 1.2 --level=raid1 --raid-devices=2 /dev/vda7 /dev/vda8",
+              "udevadm control --start-exec-queue",
               "udevadm settle",
               "mkswap -f /dev/md1 -L swap",
               "swapon -L swap",