md: delay notification of 'active_idle' to the recovery thread
sysfs_notify might sleep, so do not call it from md_safemode_timeout.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c2ff77c..0f1b830 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3483,7 +3483,7 @@
if (!atomic_read(&mddev->writes_pending)) {
mddev->safemode = 1;
if (mddev->external)
- sysfs_notify(&mddev->kobj, NULL, "array_state");
+ set_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags);
}
md_wakeup_thread(mddev->thread);
}
@@ -6051,6 +6051,9 @@
if (mddev->bitmap)
bitmap_daemon_work(mddev->bitmap);
+ if (test_and_clear_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags))
+ sysfs_notify(&mddev->kobj, NULL, "array_state");
+
if (mddev->ro)
return;
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index 9f2549a..c200b9a 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -128,6 +128,7 @@
#define MD_CHANGE_DEVS 0 /* Some device status has changed */
#define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */
#define MD_CHANGE_PENDING 2 /* superblock update in progress */
+#define MD_NOTIFY_ARRAY_STATE 3 /* atomic context wants to notify userspace */
int ro;