From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Fri, 18 Sep 2020 02:06:37 +0000 (-0700)
Subject: check: try reloading modules
X-Git-Tag: v2022.05.01~672
X-Git-Url: http://git.apps.os.sepia.ceph.com/?p=xfstests-dev.git;a=commitdiff_plain;h=9a6005c31f750c06e90f2bb36285fcd41c803798

check: try reloading modules

Optionally reload the module between each test to try to pinpoint slab
cache errors and whatnot.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
---

diff --git a/README b/README
index d0e23fcd..4af331b4 100644
--- a/README
+++ b/README
@@ -106,6 +106,9 @@ Preparing system for tests:
              - set USE_KMEMLEAK=yes to scan for memory leaks in the kernel
                after every test, if the kernel supports kmemleak.
              - set KEEP_DMESG=yes to keep dmesg log after test
+             - Set TEST_FS_MODULE_RELOAD=1 to unload the module and reload
+               it between test invocations.  This assumes that the name of
+               the module is the same as FSTYP.
 
         - or add a case to the switch in common/config assigning
           these variables based on the hostname of your test
diff --git a/check b/check
index 5ffa8777..415e0ff3 100755
--- a/check
+++ b/check
@@ -810,6 +810,15 @@ function run_section()
 			_check_dmesg || err=true
 		fi
 
+		# Reload the module after each test to check for leaks or
+		# other problems.
+		if [ -n "${TEST_FS_MODULE_RELOAD}" ]; then
+			_test_unmount 2> /dev/null
+			_scratch_unmount 2> /dev/null
+			modprobe -r fs-$FSTYP
+			modprobe fs-$FSTYP
+		fi
+
 		# Scan for memory leaks after every test so that associating
 		# a leak to a particular test will be as accurate as possible.
 		_check_kmemleak || err=true