From a34329e831adc685ec5a6a2d112a57e2867c745b Mon Sep 17 00:00:00 2001
From: Seth Howell <seth.howell@intel.com>
Date: Wed, 6 May 2020 13:34:57 -0700
Subject: [PATCH] autotest: clear system caches before running setup.sh.

This will help avoid the recent error with not being able
to allocate enough hugepages on VMs.

Signed-off-by: Seth Howell <seth.howell@intel.com>
Change-Id: Iaf495458210da79501c7168104efe97c63b7afc7
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2212
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
---
 autotest.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/autotest.sh b/autotest.sh
index 84c855b34..af7f1668f 100755
--- a/autotest.sh
+++ b/autotest.sh
@@ -22,6 +22,10 @@ if [ $(uname -s) = Linux ]; then
 	# set core_pattern to a known value to avoid ABRT, systemd-coredump, etc.
 	echo "core" > /proc/sys/kernel/core_pattern
 
+	# Make sure that the hugepage state for our VM is fresh so we don't fail
+	# hugepage allocation
+	echo 1 > /proc/sys/vm/drop_caches
+
 	# make sure nbd (network block device) driver is loaded if it is available
 	# this ensures that when tests need to use nbd, it will be fully initialized
 	modprobe nbd || true