It needs to remove disks when reshaping from raid456 to raid0. In
kernel space it sets MD_RECOVERY_RUNNING. And it will fail to change
level. So wait sometime to let md thread to clear this flag.
This is found by test case 05r6tor0.
Signed-off-by: Xiao Ni <xni@xxxxxxxxxx>
---
v2: add log to give friendly message
Grow.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Grow.c b/Grow.c
index ebb53a0dfe9c..60076f56054c 100644
--- a/Grow.c
+++ b/Grow.c
@@ -3034,6 +3034,13 @@ static int impose_level(int fd, int level, char *devname, int verbose)
makedev(disk.major, disk.minor));
hot_remove_disk(fd, makedev(disk.major, disk.minor), 1);
}
+ /*
+ * hot_remove_disk lets kernel set MD_RECOVERY_RUNNING
+ * and it can't set level. It needs to wait sometime
+ * to let md thread to clear the flag.
+ */
+ pr_info("wait 5 seconds to give kernel space to finish job\n");
+ sleep_for(5, 0, true);
}
c = map_num(pers, level);
if (c) {
--
2.32.0 (Apple Git-132)
