fix hungtask in dm code

Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>

0015-vgchange-acquire-an-exclusive-VG-lock-for-refresh.patch

@@ -0,0 +1,30 @@
+From 65d23a1d75013f328e9a3a1914484514621822ef Mon Sep 17 00:00:00 2001
+From: wangzhiqiang <wangzhiqiang95@huawei.com>
+Date: Wed, 30 Aug 2023 15:47:42 -0500
+Subject: [PATCH] vgchange: acquire an exclusive VG lock for refresh
+
+Concurrent vgchange --refresh commands can lead to hung
+tasks in dm code.
+
+Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>
+---
+ tools/vgchange.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/tools/vgchange.c b/tools/vgchange.c
+index e2d3dad02..8c1d605c6 100644
+--- a/tools/vgchange.c
++++ b/tools/vgchange.c
+@@ -1008,7 +1008,8 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
+ 
+ 	if (update)
+ 		flags |= READ_FOR_UPDATE;
+-	else if (arg_is_set(cmd, activate_ARG))
++	else if (arg_is_set(cmd, activate_ARG) ||
++		 arg_is_set(cmd, refresh_ARG))
+ 		flags |= READ_FOR_ACTIVATE;
+ 
+ 	if (!(handle = init_processing_handle(cmd, NULL))) {
+-- 
+2.33.0
+

lvm2.spec

@@ -43,7 +43,7 @@
 
 Name:      lvm2
 Version:   2.03.21
-Release:   1
+Release:   2
 Epoch:     8
 Summary:   Tools for logical volume management
 License:   GPLv2+ and LGPLv2.1 and BSD
@@ -63,6 +63,7 @@ Patch11:   0011-13-dm-disk.rules-check-DM_NAME-before-create-symlink.patch
 Patch12:   0012-lvm-code-reduce-cyclomatic-complexity.patch
 Patch13:   0013-udev-repeat.patch
 Patch14:   0014-use-sync-io-read-bcache-by-defaults.patch
+Patch15:   0015-vgchange-acquire-an-exclusive-VG-lock-for-refresh.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -489,6 +490,9 @@ fi
 
 
 %changelog
+* Tue Sep 5 2023 wangzhiqiang <wangzhiqiang95@huawei.com> - 8:2.03.21-2
+- fix hungtask in dm code
+
 * Sat Jul 29 2023 wangzhiqiang <wangzhiqiang95@huawei.com> - 8:2.03.21-1
 - upgrade version to 2.03.21