diff mbox series

[v5,07/14] md: export helpers to stop sync_thread

Message ID 20240201092559.910982-8-yukuai1@huaweicloud.com (mailing list archive)
State New, archived
Headers show
Series dm-raid/md/raid: fix v6.7 regressions | expand

Commit Message

Yu Kuai Feb. 1, 2024, 9:25 a.m. UTC 
From: Yu Kuai <yukuai3@huawei.com>

The new heleprs will be used in dm-raid in later patches to fix
regressions and prevent calling md_reap_sync_thread() directly.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
 drivers/md/md.c | 33 +++++++++++++++++++++++++++++++--
 drivers/md/md.h |  3 +++
 2 files changed, 34 insertions(+), 2 deletions(-)

Comments

Song Liu Feb. 15, 2024, 10:27 p.m. UTC | #1 
On Thu, Feb 1, 2024 at 1:30 AM Yu Kuai <yukuai1@huaweicloud.com> wrote:
>
[...]
> +
>  static void idle_sync_thread(struct mddev *mddev)
>  {
>         mutex_lock(&mddev->sync_mutex);
> -       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>
>         if (mddev_lock(mddev)) {
>                 mutex_unlock(&mddev->sync_mutex);
>                 return;
>         }
>
> +       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>         stop_sync_thread(mddev, false, true);
>         mutex_unlock(&mddev->sync_mutex);
>  }
> @@ -4936,13 +4965,13 @@ static void idle_sync_thread(struct mddev *mddev)
>  static void frozen_sync_thread(struct mddev *mddev)
>  {
>         mutex_lock(&mddev->sync_mutex);
> -       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>
>         if (mddev_lock(mddev)) {
>                 mutex_unlock(&mddev->sync_mutex);
>                 return;
>         }
>
> +       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>         stop_sync_thread(mddev, false, false);
>         mutex_unlock(&mddev->sync_mutex);
>  }

The two changes above (moving set_bit) don't seem to belong
to this patch. If they are still needed, please submit a separate
patch.

Thanks,
Song
Yu Kuai Feb. 18, 2024, 2:35 a.m. UTC | #2 
Hi,

在 2024/02/16 6:27, Song Liu 写道:
> On Thu, Feb 1, 2024 at 1:30 AM Yu Kuai <yukuai1@huaweicloud.com> wrote:
>>
> [...]
>> +
>>   static void idle_sync_thread(struct mddev *mddev)
>>   {
>>          mutex_lock(&mddev->sync_mutex);
>> -       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>>
>>          if (mddev_lock(mddev)) {
>>                  mutex_unlock(&mddev->sync_mutex);
>>                  return;
>>          }
>>
>> +       clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>>          stop_sync_thread(mddev, false, true);
>>          mutex_unlock(&mddev->sync_mutex);
>>   }
>> @@ -4936,13 +4965,13 @@ static void idle_sync_thread(struct mddev *mddev)
>>   static void frozen_sync_thread(struct mddev *mddev)
>>   {
>>          mutex_lock(&mddev->sync_mutex);
>> -       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>>
>>          if (mddev_lock(mddev)) {
>>                  mutex_unlock(&mddev->sync_mutex);
>>                  return;
>>          }
>>
>> +       set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
>>          stop_sync_thread(mddev, false, false);
>>          mutex_unlock(&mddev->sync_mutex);
>>   }
> 
> The two changes above (moving set_bit) don't seem to belong
> to this patch. If they are still needed, please submit a separate
> patch.

Yes, they are not needed in this patchset. I forgot to remove them while
solving conflicts with other patches locally.

Thanks,
Kuai

> 
> Thanks,
> Song
> 
> .
>
diff mbox series

Patch

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9e41a9aaba8b..19f16a77cf9c 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4919,16 +4919,45 @@  static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq)
 		mddev_lock_nointr(mddev);
 }
 
+void md_idle_sync_thread(struct mddev *mddev)
+{
+	lockdep_assert_held(&mddev->reconfig_mutex);
+
+	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+	stop_sync_thread(mddev, true, true);
+}
+EXPORT_SYMBOL_GPL(md_idle_sync_thread);
+
+void md_frozen_sync_thread(struct mddev *mddev)
+{
+	lockdep_assert_held(&mddev->reconfig_mutex);
+
+	set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+	stop_sync_thread(mddev, true, false);
+}
+EXPORT_SYMBOL_GPL(md_frozen_sync_thread);
+
+void md_unfrozen_sync_thread(struct mddev *mddev)
+{
+	lockdep_assert_held(&mddev->reconfig_mutex);
+
+	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+	set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+	md_wakeup_thread(mddev->thread);
+	sysfs_notify_dirent_safe(mddev->sysfs_action);
+}
+EXPORT_SYMBOL_GPL(md_unfrozen_sync_thread);
+
 static void idle_sync_thread(struct mddev *mddev)
 {
 	mutex_lock(&mddev->sync_mutex);
-	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
 
 	if (mddev_lock(mddev)) {
 		mutex_unlock(&mddev->sync_mutex);
 		return;
 	}
 
+	clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
 	stop_sync_thread(mddev, false, true);
 	mutex_unlock(&mddev->sync_mutex);
 }
@@ -4936,13 +4965,13 @@  static void idle_sync_thread(struct mddev *mddev)
 static void frozen_sync_thread(struct mddev *mddev)
 {
 	mutex_lock(&mddev->sync_mutex);
-	set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
 
 	if (mddev_lock(mddev)) {
 		mutex_unlock(&mddev->sync_mutex);
 		return;
 	}
 
+	set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
 	stop_sync_thread(mddev, false, false);
 	mutex_unlock(&mddev->sync_mutex);
 }
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 8d881cc59799..437ab70ce79b 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -781,6 +781,9 @@  extern void md_rdev_clear(struct md_rdev *rdev);
 extern void md_handle_request(struct mddev *mddev, struct bio *bio);
 extern int mddev_suspend(struct mddev *mddev, bool interruptible);
 extern void mddev_resume(struct mddev *mddev);
+extern void md_idle_sync_thread(struct mddev *mddev);
+extern void md_frozen_sync_thread(struct mddev *mddev);
+extern void md_unfrozen_sync_thread(struct mddev *mddev);
 
 extern void md_reload_sb(struct mddev *mddev, int raid_disk);
 extern void md_update_sb(struct mddev *mddev, int force);