[PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

Hi Jakub,

This is reviewed series of ref_tracker patches, ready to merge
via network tree, rebased on net-next/main.
i915 patches will be merged later via intel-gfx tree.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
Changes in v9:
- removed i915 patches, just to merge network part
- added r-b-s
- Link to v8: https://lore.kernel.org/r/20230224-track_gt-v8-0-4b6517e61be6@intel.com

Changes in v8:
- addressed comments from Eric, Zhou and CI, thanks,
- added ref_tracker_dir_init name argument to all callers in one patch
- moved intel_wakeref_tracker_show to *.c
- s/intel_wakeref_tracker_show/intel_ref_tracker_show/
- removed 'default n' from Kconfig
- changed strlcpy to strscpy,
- removed assignement from if condition,
- removed long lines from patch description
- added tags
- Link to v7: https://lore.kernel.org/r/20230224-track_gt-v7-0-11f08358c1ec@intel.com

Changes in v7:
- removed 8th patch (hold wakeref), as it was already merged
- added tags (thx Andi)
- Link to v6: https://lore.kernel.org/r/20230224-track_gt-v6-0-0dc8601fd02f@intel.com

Changes in v6:
- rebased to solve minor conflict and allow CI testing
- Link to v5: https://lore.kernel.org/r/20230224-track_gt-v5-0-77be86f2c872@intel.com

Changes in v5 (thx Andi for review):
- use *_locked convention instead of __*,
- improved commit messages,
- re-worked i915 patches, squashed separation and conversion patches,
- added tags,
- Link to v4: https://lore.kernel.org/r/20230224-track_gt-v4-0-464e8ab4c9ab@intel.com

Changes in v4:
- split "Separate wakeref tracking" to smaller parts
- fixed typos,
- Link to v1-v3: https://patchwork.freedesktop.org/series/100327/

---
Andrzej Hajda (4):
      lib/ref_tracker: add unlocked leak print helper
      lib/ref_tracker: improve printing stats
      lib/ref_tracker: add printing to memory buffer
      lib/ref_tracker: remove warnings in case of allocation failure

 include/linux/ref_tracker.h |  25 ++++++-
 lib/ref_tracker.c           | 179 ++++++++++++++++++++++++++++++++++++--------
 lib/test_ref_tracker.c      |   2 +-
 net/core/dev.c              |   2 +-
 net/core/net_namespace.c    |   4 +-
 5 files changed, 176 insertions(+), 36 deletions(-)
---
base-commit: 23fcb62bc19c37adb72a585d5dc702ac55b74fb1
change-id: 20230224-track_gt-1b3da8bdacd7

Best regards,
-- 
Andrzej Hajda <andrzej.hajda@intel.com>

[PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

Hi Jakub,

This is reviewed series of ref_tracker patches, ready to merge
via network tree, rebased on net-next/main.
i915 patches will be merged later via intel-gfx tree.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
Changes in v9:
- removed i915 patches, just to merge network part
- added r-b-s
- Link to v8: https://lore.kernel.org/r/20230224-track_gt-v8-0-4b6517e61be6@intel.com

Changes in v8:
- addressed comments from Eric, Zhou and CI, thanks,
- added ref_tracker_dir_init name argument to all callers in one patch
- moved intel_wakeref_tracker_show to *.c
- s/intel_wakeref_tracker_show/intel_ref_tracker_show/
- removed 'default n' from Kconfig
- changed strlcpy to strscpy,
- removed assignement from if condition,
- removed long lines from patch description
- added tags
- Link to v7: https://lore.kernel.org/r/20230224-track_gt-v7-0-11f08358c1ec@intel.com

Changes in v7:
- removed 8th patch (hold wakeref), as it was already merged
- added tags (thx Andi)
- Link to v6: https://lore.kernel.org/r/20230224-track_gt-v6-0-0dc8601fd02f@intel.com

Changes in v6:
- rebased to solve minor conflict and allow CI testing
- Link to v5: https://lore.kernel.org/r/20230224-track_gt-v5-0-77be86f2c872@intel.com

Changes in v5 (thx Andi for review):
- use *_locked convention instead of __*,
- improved commit messages,
- re-worked i915 patches, squashed separation and conversion patches,
- added tags,
- Link to v4: https://lore.kernel.org/r/20230224-track_gt-v4-0-464e8ab4c9ab@intel.com

Changes in v4:
- split "Separate wakeref tracking" to smaller parts
- fixed typos,
- Link to v1-v3: https://patchwork.freedesktop.org/series/100327/

---
Andrzej Hajda (4):
      lib/ref_tracker: add unlocked leak print helper
      lib/ref_tracker: improve printing stats
      lib/ref_tracker: add printing to memory buffer
      lib/ref_tracker: remove warnings in case of allocation failure

 include/linux/ref_tracker.h |  25 ++++++-
 lib/ref_tracker.c           | 179 ++++++++++++++++++++++++++++++++++++--------
 lib/test_ref_tracker.c      |   2 +-
 net/core/dev.c              |   2 +-
 net/core/net_namespace.c    |   4 +-
 5 files changed, 176 insertions(+), 36 deletions(-)
---
base-commit: 23fcb62bc19c37adb72a585d5dc702ac55b74fb1
change-id: 20230224-track_gt-1b3da8bdacd7

Best regards,
-- 
Andrzej Hajda <andrzej.hajda@intel.com>

[Intel-gfx] [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

Hi Jakub,

This is reviewed series of ref_tracker patches, ready to merge
via network tree, rebased on net-next/main.
i915 patches will be merged later via intel-gfx tree.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
---
Changes in v9:
- removed i915 patches, just to merge network part
- added r-b-s
- Link to v8: https://lore.kernel.org/r/20230224-track_gt-v8-0-4b6517e61be6@intel.com

Changes in v8:
- addressed comments from Eric, Zhou and CI, thanks,
- added ref_tracker_dir_init name argument to all callers in one patch
- moved intel_wakeref_tracker_show to *.c
- s/intel_wakeref_tracker_show/intel_ref_tracker_show/
- removed 'default n' from Kconfig
- changed strlcpy to strscpy,
- removed assignement from if condition,
- removed long lines from patch description
- added tags
- Link to v7: https://lore.kernel.org/r/20230224-track_gt-v7-0-11f08358c1ec@intel.com

Changes in v7:
- removed 8th patch (hold wakeref), as it was already merged
- added tags (thx Andi)
- Link to v6: https://lore.kernel.org/r/20230224-track_gt-v6-0-0dc8601fd02f@intel.com

Changes in v6:
- rebased to solve minor conflict and allow CI testing
- Link to v5: https://lore.kernel.org/r/20230224-track_gt-v5-0-77be86f2c872@intel.com

Changes in v5 (thx Andi for review):
- use *_locked convention instead of __*,
- improved commit messages,
- re-worked i915 patches, squashed separation and conversion patches,
- added tags,
- Link to v4: https://lore.kernel.org/r/20230224-track_gt-v4-0-464e8ab4c9ab@intel.com

Changes in v4:
- split "Separate wakeref tracking" to smaller parts
- fixed typos,
- Link to v1-v3: https://patchwork.freedesktop.org/series/100327/

---
Andrzej Hajda (4):
      lib/ref_tracker: add unlocked leak print helper
      lib/ref_tracker: improve printing stats
      lib/ref_tracker: add printing to memory buffer
      lib/ref_tracker: remove warnings in case of allocation failure

 include/linux/ref_tracker.h |  25 ++++++-
 lib/ref_tracker.c           | 179 ++++++++++++++++++++++++++++++++++++--------
 lib/test_ref_tracker.c      |   2 +-
 net/core/dev.c              |   2 +-
 net/core/net_namespace.c    |   4 +-
 5 files changed, 176 insertions(+), 36 deletions(-)
---
base-commit: 23fcb62bc19c37adb72a585d5dc702ac55b74fb1
change-id: 20230224-track_gt-1b3da8bdacd7

Best regards,
-- 
Andrzej Hajda <andrzej.hajda@intel.com>

[PATCH v9 1/4] lib/ref_tracker: add unlocked leak print helper

[Andrzej Hajda]

To have reliable detection of leaks, caller must be able to check under
the same lock both: tracked counter and the leaks. dir.lock is natural
candidate for such lock and unlocked print helper can be called with this
lock taken.
As a bonus we can reuse this helper in ref_tracker_dir_exit.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 ++++++
 lib/ref_tracker.c           | 66 ++++++++++++++++++++++++++-------------------
 2 files changed, 46 insertions(+), 28 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 9ca353ab712b5e..87a92f2bec1b88 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -36,6 +36,9 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir);
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit);
+
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
@@ -56,6 +59,11 @@ static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 }
 
+static inline void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+						unsigned int display_limit)
+{
+}
+
 static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 					 unsigned int display_limit)
 {
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index dc7b14aa3431e2..d4eb0929af8f96 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -14,6 +14,38 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker *tracker;
+	unsigned int i = 0;
+
+	lockdep_assert_held(&dir->lock);
+
+	list_for_each_entry(tracker, &dir->list, head) {
+		if (i < display_limit) {
+			pr_err("leaked reference.\n");
+			if (tracker->alloc_stack_handle)
+				stack_depot_print(tracker->alloc_stack_handle);
+			i++;
+		} else {
+			break;
+		}
+	}
+}
+EXPORT_SYMBOL(ref_tracker_dir_print_locked);
+
+void ref_tracker_dir_print(struct ref_tracker_dir *dir,
+			   unsigned int display_limit)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	ref_tracker_dir_print_locked(dir, display_limit);
+	spin_unlock_irqrestore(&dir->lock, flags);
+}
+EXPORT_SYMBOL(ref_tracker_dir_print);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;
@@ -27,13 +59,13 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 		kfree(tracker);
 		dir->quarantine_avail++;
 	}
-	list_for_each_entry_safe(tracker, n, &dir->list, head) {
-		pr_err("leaked reference.\n");
-		if (tracker->alloc_stack_handle)
-			stack_depot_print(tracker->alloc_stack_handle);
+	if (!list_empty(&dir->list)) {
+		ref_tracker_dir_print_locked(dir, 16);
 		leak = true;
-		list_del(&tracker->head);
-		kfree(tracker);
+		list_for_each_entry_safe(tracker, n, &dir->list, head) {
+			list_del(&tracker->head);
+			kfree(tracker);
+		}
 	}
 	spin_unlock_irqrestore(&dir->lock, flags);
 	WARN_ON_ONCE(leak);
@@ -42,28 +74,6 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 }
 EXPORT_SYMBOL(ref_tracker_dir_exit);
 
-void ref_tracker_dir_print(struct ref_tracker_dir *dir,
-			   unsigned int display_limit)
-{
-	struct ref_tracker *tracker;
-	unsigned long flags;
-	unsigned int i = 0;
-
-	spin_lock_irqsave(&dir->lock, flags);
-	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&dir->lock, flags);
-}
-EXPORT_SYMBOL(ref_tracker_dir_print);
-
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp,
 		      gfp_t gfp)

-- 
2.34.1

[PATCH v9 1/4] lib/ref_tracker: add unlocked leak print helper

[Andrzej Hajda]

To have reliable detection of leaks, caller must be able to check under
the same lock both: tracked counter and the leaks. dir.lock is natural
candidate for such lock and unlocked print helper can be called with this
lock taken.
As a bonus we can reuse this helper in ref_tracker_dir_exit.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 ++++++
 lib/ref_tracker.c           | 66 ++++++++++++++++++++++++++-------------------
 2 files changed, 46 insertions(+), 28 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 9ca353ab712b5e..87a92f2bec1b88 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -36,6 +36,9 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir);
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit);
+
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
@@ -56,6 +59,11 @@ static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 }
 
+static inline void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+						unsigned int display_limit)
+{
+}
+
 static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 					 unsigned int display_limit)
 {
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index dc7b14aa3431e2..d4eb0929af8f96 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -14,6 +14,38 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker *tracker;
+	unsigned int i = 0;
+
+	lockdep_assert_held(&dir->lock);
+
+	list_for_each_entry(tracker, &dir->list, head) {
+		if (i < display_limit) {
+			pr_err("leaked reference.\n");
+			if (tracker->alloc_stack_handle)
+				stack_depot_print(tracker->alloc_stack_handle);
+			i++;
+		} else {
+			break;
+		}
+	}
+}
+EXPORT_SYMBOL(ref_tracker_dir_print_locked);
+
+void ref_tracker_dir_print(struct ref_tracker_dir *dir,
+			   unsigned int display_limit)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	ref_tracker_dir_print_locked(dir, display_limit);
+	spin_unlock_irqrestore(&dir->lock, flags);
+}
+EXPORT_SYMBOL(ref_tracker_dir_print);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;
@@ -27,13 +59,13 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 		kfree(tracker);
 		dir->quarantine_avail++;
 	}
-	list_for_each_entry_safe(tracker, n, &dir->list, head) {
-		pr_err("leaked reference.\n");
-		if (tracker->alloc_stack_handle)
-			stack_depot_print(tracker->alloc_stack_handle);
+	if (!list_empty(&dir->list)) {
+		ref_tracker_dir_print_locked(dir, 16);
 		leak = true;
-		list_del(&tracker->head);
-		kfree(tracker);
+		list_for_each_entry_safe(tracker, n, &dir->list, head) {
+			list_del(&tracker->head);
+			kfree(tracker);
+		}
 	}
 	spin_unlock_irqrestore(&dir->lock, flags);
 	WARN_ON_ONCE(leak);
@@ -42,28 +74,6 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 }
 EXPORT_SYMBOL(ref_tracker_dir_exit);
 
-void ref_tracker_dir_print(struct ref_tracker_dir *dir,
-			   unsigned int display_limit)
-{
-	struct ref_tracker *tracker;
-	unsigned long flags;
-	unsigned int i = 0;
-
-	spin_lock_irqsave(&dir->lock, flags);
-	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&dir->lock, flags);
-}
-EXPORT_SYMBOL(ref_tracker_dir_print);
-
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp,
 		      gfp_t gfp)

-- 
2.34.1

[Intel-gfx] [PATCH v9 1/4] lib/ref_tracker: add unlocked leak print helper

[Andrzej Hajda]

To have reliable detection of leaks, caller must be able to check under
the same lock both: tracked counter and the leaks. dir.lock is natural
candidate for such lock and unlocked print helper can be called with this
lock taken.
As a bonus we can reuse this helper in ref_tracker_dir_exit.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 ++++++
 lib/ref_tracker.c           | 66 ++++++++++++++++++++++++++-------------------
 2 files changed, 46 insertions(+), 28 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 9ca353ab712b5e..87a92f2bec1b88 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -36,6 +36,9 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir);
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit);
+
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
@@ -56,6 +59,11 @@ static inline void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 }
 
+static inline void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+						unsigned int display_limit)
+{
+}
+
 static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 					 unsigned int display_limit)
 {
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index dc7b14aa3431e2..d4eb0929af8f96 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -14,6 +14,38 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker *tracker;
+	unsigned int i = 0;
+
+	lockdep_assert_held(&dir->lock);
+
+	list_for_each_entry(tracker, &dir->list, head) {
+		if (i < display_limit) {
+			pr_err("leaked reference.\n");
+			if (tracker->alloc_stack_handle)
+				stack_depot_print(tracker->alloc_stack_handle);
+			i++;
+		} else {
+			break;
+		}
+	}
+}
+EXPORT_SYMBOL(ref_tracker_dir_print_locked);
+
+void ref_tracker_dir_print(struct ref_tracker_dir *dir,
+			   unsigned int display_limit)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	ref_tracker_dir_print_locked(dir, display_limit);
+	spin_unlock_irqrestore(&dir->lock, flags);
+}
+EXPORT_SYMBOL(ref_tracker_dir_print);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;
@@ -27,13 +59,13 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 		kfree(tracker);
 		dir->quarantine_avail++;
 	}
-	list_for_each_entry_safe(tracker, n, &dir->list, head) {
-		pr_err("leaked reference.\n");
-		if (tracker->alloc_stack_handle)
-			stack_depot_print(tracker->alloc_stack_handle);
+	if (!list_empty(&dir->list)) {
+		ref_tracker_dir_print_locked(dir, 16);
 		leak = true;
-		list_del(&tracker->head);
-		kfree(tracker);
+		list_for_each_entry_safe(tracker, n, &dir->list, head) {
+			list_del(&tracker->head);
+			kfree(tracker);
+		}
 	}
 	spin_unlock_irqrestore(&dir->lock, flags);
 	WARN_ON_ONCE(leak);
@@ -42,28 +74,6 @@ void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 }
 EXPORT_SYMBOL(ref_tracker_dir_exit);
 
-void ref_tracker_dir_print(struct ref_tracker_dir *dir,
-			   unsigned int display_limit)
-{
-	struct ref_tracker *tracker;
-	unsigned long flags;
-	unsigned int i = 0;
-
-	spin_lock_irqsave(&dir->lock, flags);
-	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&dir->lock, flags);
-}
-EXPORT_SYMBOL(ref_tracker_dir_print);
-
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp,
 		      gfp_t gfp)

-- 
2.34.1

[PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Andrzej Hajda]

In case the library is tracking busy subsystem, simply
printing stack for every active reference will spam log
with long, hard to read, redundant stack traces. To improve
readabilty following changes have been made:
- reports are printed per stack_handle - log is more compact,
- added display name for ref_tracker_dir - it will differentiate
  multiple subsystems,
- stack trace is printed indented, in the same printk call,
- info about dropped references is printed as well.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  9 ++++-
 lib/ref_tracker.c           | 90 +++++++++++++++++++++++++++++++++++++++------
 lib/test_ref_tracker.c      |  2 +-
 net/core/dev.c              |  2 +-
 net/core/net_namespace.c    |  4 +-
 5 files changed, 90 insertions(+), 17 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 87a92f2bec1b88..19a69e7809d6c1 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -17,12 +17,15 @@ struct ref_tracker_dir {
 	bool			dead;
 	struct list_head	list; /* List of active trackers */
 	struct list_head	quarantine; /* List of dead trackers */
+	char			name[32];
 #endif
 };
 
 #ifdef CONFIG_REF_TRACKER
+
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 	INIT_LIST_HEAD(&dir->list);
 	INIT_LIST_HEAD(&dir->quarantine);
@@ -31,6 +34,7 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 	dir->dead = false;
 	refcount_set(&dir->untracked, 1);
 	refcount_set(&dir->no_tracker, 1);
+	strscpy(dir->name, name, sizeof(dir->name));
 	stack_depot_init();
 }
 
@@ -51,7 +55,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 #else /* CONFIG_REF_TRACKER */
 
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 }
 
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index d4eb0929af8f96..2ffe79c90c1771 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -1,11 +1,16 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
+
+#define pr_fmt(fmt) "ref_tracker: " fmt
+
 #include <linux/export.h>
+#include <linux/list_sort.h>
 #include <linux/ref_tracker.h>
 #include <linux/slab.h>
 #include <linux/stacktrace.h>
 #include <linux/stackdepot.h>
 
 #define REF_TRACKER_STACK_ENTRIES 16
+#define STACK_BUF_SIZE 1024
 
 struct ref_tracker {
 	struct list_head	head;   /* anchor into dir->list or dir->quarantine */
@@ -14,24 +19,87 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ref_tracker_dir_stats {
+	int total;
+	int count;
+	struct {
+		depot_stack_handle_t stack_handle;
+		unsigned int count;
+	} stacks[];
+};
+
+static struct ref_tracker_dir_stats *
+ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 {
+	struct ref_tracker_dir_stats *stats;
 	struct ref_tracker *tracker;
-	unsigned int i = 0;
 
-	lockdep_assert_held(&dir->lock);
+	stats = kmalloc(struct_size(stats, stacks, limit),
+			GFP_NOWAIT | __GFP_NOWARN);
+	if (!stats)
+		return ERR_PTR(-ENOMEM);
+	stats->total = 0;
+	stats->count = 0;
 
 	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
+		depot_stack_handle_t stack = tracker->alloc_stack_handle;
+		int i;
+
+		++stats->total;
+		for (i = 0; i < stats->count; ++i)
+			if (stats->stacks[i].stack_handle == stack)
+				break;
+		if (i >= limit)
+			continue;
+		if (i >= stats->count) {
+			stats->stacks[i].stack_handle = stack;
+			stats->stacks[i].count = 0;
+			++stats->count;
 		}
+		++stats->stacks[i].count;
+	}
+
+	return stats;
+}
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker_dir_stats *stats;
+	unsigned int i = 0, skipped;
+	depot_stack_handle_t stack;
+	char *sbuf;
+
+	lockdep_assert_held(&dir->lock);
+
+	if (list_empty(&dir->list))
+		return;
+
+	stats = ref_tracker_get_stats(dir, display_limit);
+	if (IS_ERR(stats)) {
+		pr_err("%s@%pK: couldn't get stats, error %pe\n",
+		       dir->name, dir, stats);
+		return;
 	}
+
+	sbuf = kmalloc(STACK_BUF_SIZE, GFP_NOWAIT | __GFP_NOWARN);
+
+	for (i = 0, skipped = stats->total; i < stats->count; ++i) {
+		stack = stats->stacks[i].stack_handle;
+		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
+			sbuf[0] = 0;
+		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+		       stats->stacks[i].count, stats->total, sbuf);
+		skipped -= stats->stacks[i].count;
+	}
+
+	if (skipped)
+		pr_err("%s@%pK skipped reports about %d/%d users.\n",
+		       dir->name, dir, skipped, stats->total);
+
+	kfree(sbuf);
+
+	kfree(stats);
 }
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
diff --git a/lib/test_ref_tracker.c b/lib/test_ref_tracker.c
index 19d7dec70cc62f..49970a7c96f3f4 100644
--- a/lib/test_ref_tracker.c
+++ b/lib/test_ref_tracker.c
@@ -64,7 +64,7 @@ static int __init test_ref_tracker_init(void)
 {
 	int i;
 
-	ref_tracker_dir_init(&ref_dir, 100);
+	ref_tracker_dir_init(&ref_dir, 100, "selftest");
 
 	timer_setup(&test_ref_tracker_timer, test_ref_tracker_timer_func, 0);
 	mod_timer(&test_ref_tracker_timer, jiffies + 1);
diff --git a/net/core/dev.c b/net/core/dev.c
index 99d99b247bc976..8870eeb5a2ae1f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10635,7 +10635,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 	dev = PTR_ALIGN(p, NETDEV_ALIGN);
 	dev->padded = (char *)dev - (char *)p;
 
-	ref_tracker_dir_init(&dev->refcnt_tracker, 128);
+	ref_tracker_dir_init(&dev->refcnt_tracker, 128, name);
 #ifdef CONFIG_PCPU_DEV_REFCNT
 	dev->pcpu_refcnt = alloc_percpu(int);
 	if (!dev->pcpu_refcnt)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 3e3598cd49f23e..f4183c4c1ec82f 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -308,7 +308,7 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_id);
 /* init code that must occur even if setup_net() is not called. */
 static __net_init void preinit_net(struct net *net)
 {
-	ref_tracker_dir_init(&net->notrefcnt_tracker, 128);
+	ref_tracker_dir_init(&net->notrefcnt_tracker, 128, "net notrefcnt");
 }
 
 /*
@@ -322,7 +322,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
 	LIST_HEAD(net_exit_list);
 
 	refcount_set(&net->ns.count, 1);
-	ref_tracker_dir_init(&net->refcnt_tracker, 128);
+	ref_tracker_dir_init(&net->refcnt_tracker, 128, "net refcnt");
 
 	refcount_set(&net->passive, 1);
 	get_random_bytes(&net->hash_mix, sizeof(u32));

-- 
2.34.1

[PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Andrzej Hajda]

In case the library is tracking busy subsystem, simply
printing stack for every active reference will spam log
with long, hard to read, redundant stack traces. To improve
readabilty following changes have been made:
- reports are printed per stack_handle - log is more compact,
- added display name for ref_tracker_dir - it will differentiate
  multiple subsystems,
- stack trace is printed indented, in the same printk call,
- info about dropped references is printed as well.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  9 ++++-
 lib/ref_tracker.c           | 90 +++++++++++++++++++++++++++++++++++++++------
 lib/test_ref_tracker.c      |  2 +-
 net/core/dev.c              |  2 +-
 net/core/net_namespace.c    |  4 +-
 5 files changed, 90 insertions(+), 17 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 87a92f2bec1b88..19a69e7809d6c1 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -17,12 +17,15 @@ struct ref_tracker_dir {
 	bool			dead;
 	struct list_head	list; /* List of active trackers */
 	struct list_head	quarantine; /* List of dead trackers */
+	char			name[32];
 #endif
 };
 
 #ifdef CONFIG_REF_TRACKER
+
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 	INIT_LIST_HEAD(&dir->list);
 	INIT_LIST_HEAD(&dir->quarantine);
@@ -31,6 +34,7 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 	dir->dead = false;
 	refcount_set(&dir->untracked, 1);
 	refcount_set(&dir->no_tracker, 1);
+	strscpy(dir->name, name, sizeof(dir->name));
 	stack_depot_init();
 }
 
@@ -51,7 +55,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 #else /* CONFIG_REF_TRACKER */
 
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 }
 
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index d4eb0929af8f96..2ffe79c90c1771 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -1,11 +1,16 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
+
+#define pr_fmt(fmt) "ref_tracker: " fmt
+
 #include <linux/export.h>
+#include <linux/list_sort.h>
 #include <linux/ref_tracker.h>
 #include <linux/slab.h>
 #include <linux/stacktrace.h>
 #include <linux/stackdepot.h>
 
 #define REF_TRACKER_STACK_ENTRIES 16
+#define STACK_BUF_SIZE 1024
 
 struct ref_tracker {
 	struct list_head	head;   /* anchor into dir->list or dir->quarantine */
@@ -14,24 +19,87 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ref_tracker_dir_stats {
+	int total;
+	int count;
+	struct {
+		depot_stack_handle_t stack_handle;
+		unsigned int count;
+	} stacks[];
+};
+
+static struct ref_tracker_dir_stats *
+ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 {
+	struct ref_tracker_dir_stats *stats;
 	struct ref_tracker *tracker;
-	unsigned int i = 0;
 
-	lockdep_assert_held(&dir->lock);
+	stats = kmalloc(struct_size(stats, stacks, limit),
+			GFP_NOWAIT | __GFP_NOWARN);
+	if (!stats)
+		return ERR_PTR(-ENOMEM);
+	stats->total = 0;
+	stats->count = 0;
 
 	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
+		depot_stack_handle_t stack = tracker->alloc_stack_handle;
+		int i;
+
+		++stats->total;
+		for (i = 0; i < stats->count; ++i)
+			if (stats->stacks[i].stack_handle == stack)
+				break;
+		if (i >= limit)
+			continue;
+		if (i >= stats->count) {
+			stats->stacks[i].stack_handle = stack;
+			stats->stacks[i].count = 0;
+			++stats->count;
 		}
+		++stats->stacks[i].count;
+	}
+
+	return stats;
+}
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker_dir_stats *stats;
+	unsigned int i = 0, skipped;
+	depot_stack_handle_t stack;
+	char *sbuf;
+
+	lockdep_assert_held(&dir->lock);
+
+	if (list_empty(&dir->list))
+		return;
+
+	stats = ref_tracker_get_stats(dir, display_limit);
+	if (IS_ERR(stats)) {
+		pr_err("%s@%pK: couldn't get stats, error %pe\n",
+		       dir->name, dir, stats);
+		return;
 	}
+
+	sbuf = kmalloc(STACK_BUF_SIZE, GFP_NOWAIT | __GFP_NOWARN);
+
+	for (i = 0, skipped = stats->total; i < stats->count; ++i) {
+		stack = stats->stacks[i].stack_handle;
+		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
+			sbuf[0] = 0;
+		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+		       stats->stacks[i].count, stats->total, sbuf);
+		skipped -= stats->stacks[i].count;
+	}
+
+	if (skipped)
+		pr_err("%s@%pK skipped reports about %d/%d users.\n",
+		       dir->name, dir, skipped, stats->total);
+
+	kfree(sbuf);
+
+	kfree(stats);
 }
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
diff --git a/lib/test_ref_tracker.c b/lib/test_ref_tracker.c
index 19d7dec70cc62f..49970a7c96f3f4 100644
--- a/lib/test_ref_tracker.c
+++ b/lib/test_ref_tracker.c
@@ -64,7 +64,7 @@ static int __init test_ref_tracker_init(void)
 {
 	int i;
 
-	ref_tracker_dir_init(&ref_dir, 100);
+	ref_tracker_dir_init(&ref_dir, 100, "selftest");
 
 	timer_setup(&test_ref_tracker_timer, test_ref_tracker_timer_func, 0);
 	mod_timer(&test_ref_tracker_timer, jiffies + 1);
diff --git a/net/core/dev.c b/net/core/dev.c
index 99d99b247bc976..8870eeb5a2ae1f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10635,7 +10635,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 	dev = PTR_ALIGN(p, NETDEV_ALIGN);
 	dev->padded = (char *)dev - (char *)p;
 
-	ref_tracker_dir_init(&dev->refcnt_tracker, 128);
+	ref_tracker_dir_init(&dev->refcnt_tracker, 128, name);
 #ifdef CONFIG_PCPU_DEV_REFCNT
 	dev->pcpu_refcnt = alloc_percpu(int);
 	if (!dev->pcpu_refcnt)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 3e3598cd49f23e..f4183c4c1ec82f 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -308,7 +308,7 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_id);
 /* init code that must occur even if setup_net() is not called. */
 static __net_init void preinit_net(struct net *net)
 {
-	ref_tracker_dir_init(&net->notrefcnt_tracker, 128);
+	ref_tracker_dir_init(&net->notrefcnt_tracker, 128, "net notrefcnt");
 }
 
 /*
@@ -322,7 +322,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
 	LIST_HEAD(net_exit_list);
 
 	refcount_set(&net->ns.count, 1);
-	ref_tracker_dir_init(&net->refcnt_tracker, 128);
+	ref_tracker_dir_init(&net->refcnt_tracker, 128, "net refcnt");
 
 	refcount_set(&net->passive, 1);
 	get_random_bytes(&net->hash_mix, sizeof(u32));

-- 
2.34.1

[Intel-gfx] [PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Andrzej Hajda]

In case the library is tracking busy subsystem, simply
printing stack for every active reference will spam log
with long, hard to read, redundant stack traces. To improve
readabilty following changes have been made:
- reports are printed per stack_handle - log is more compact,
- added display name for ref_tracker_dir - it will differentiate
  multiple subsystems,
- stack trace is printed indented, in the same printk call,
- info about dropped references is printed as well.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  9 ++++-
 lib/ref_tracker.c           | 90 +++++++++++++++++++++++++++++++++++++++------
 lib/test_ref_tracker.c      |  2 +-
 net/core/dev.c              |  2 +-
 net/core/net_namespace.c    |  4 +-
 5 files changed, 90 insertions(+), 17 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 87a92f2bec1b88..19a69e7809d6c1 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -17,12 +17,15 @@ struct ref_tracker_dir {
 	bool			dead;
 	struct list_head	list; /* List of active trackers */
 	struct list_head	quarantine; /* List of dead trackers */
+	char			name[32];
 #endif
 };
 
 #ifdef CONFIG_REF_TRACKER
+
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 	INIT_LIST_HEAD(&dir->list);
 	INIT_LIST_HEAD(&dir->quarantine);
@@ -31,6 +34,7 @@ static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
 	dir->dead = false;
 	refcount_set(&dir->untracked, 1);
 	refcount_set(&dir->no_tracker, 1);
+	strscpy(dir->name, name, sizeof(dir->name));
 	stack_depot_init();
 }
 
@@ -51,7 +55,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 #else /* CONFIG_REF_TRACKER */
 
 static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
-					unsigned int quarantine_count)
+					unsigned int quarantine_count,
+					const char *name)
 {
 }
 
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index d4eb0929af8f96..2ffe79c90c1771 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -1,11 +1,16 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
+
+#define pr_fmt(fmt) "ref_tracker: " fmt
+
 #include <linux/export.h>
+#include <linux/list_sort.h>
 #include <linux/ref_tracker.h>
 #include <linux/slab.h>
 #include <linux/stacktrace.h>
 #include <linux/stackdepot.h>
 
 #define REF_TRACKER_STACK_ENTRIES 16
+#define STACK_BUF_SIZE 1024
 
 struct ref_tracker {
 	struct list_head	head;   /* anchor into dir->list or dir->quarantine */
@@ -14,24 +19,87 @@ struct ref_tracker {
 	depot_stack_handle_t	free_stack_handle;
 };
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ref_tracker_dir_stats {
+	int total;
+	int count;
+	struct {
+		depot_stack_handle_t stack_handle;
+		unsigned int count;
+	} stacks[];
+};
+
+static struct ref_tracker_dir_stats *
+ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 {
+	struct ref_tracker_dir_stats *stats;
 	struct ref_tracker *tracker;
-	unsigned int i = 0;
 
-	lockdep_assert_held(&dir->lock);
+	stats = kmalloc(struct_size(stats, stacks, limit),
+			GFP_NOWAIT | __GFP_NOWARN);
+	if (!stats)
+		return ERR_PTR(-ENOMEM);
+	stats->total = 0;
+	stats->count = 0;
 
 	list_for_each_entry(tracker, &dir->list, head) {
-		if (i < display_limit) {
-			pr_err("leaked reference.\n");
-			if (tracker->alloc_stack_handle)
-				stack_depot_print(tracker->alloc_stack_handle);
-			i++;
-		} else {
-			break;
+		depot_stack_handle_t stack = tracker->alloc_stack_handle;
+		int i;
+
+		++stats->total;
+		for (i = 0; i < stats->count; ++i)
+			if (stats->stacks[i].stack_handle == stack)
+				break;
+		if (i >= limit)
+			continue;
+		if (i >= stats->count) {
+			stats->stacks[i].stack_handle = stack;
+			stats->stacks[i].count = 0;
+			++stats->count;
 		}
+		++stats->stacks[i].count;
+	}
+
+	return stats;
+}
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ref_tracker_dir_stats *stats;
+	unsigned int i = 0, skipped;
+	depot_stack_handle_t stack;
+	char *sbuf;
+
+	lockdep_assert_held(&dir->lock);
+
+	if (list_empty(&dir->list))
+		return;
+
+	stats = ref_tracker_get_stats(dir, display_limit);
+	if (IS_ERR(stats)) {
+		pr_err("%s@%pK: couldn't get stats, error %pe\n",
+		       dir->name, dir, stats);
+		return;
 	}
+
+	sbuf = kmalloc(STACK_BUF_SIZE, GFP_NOWAIT | __GFP_NOWARN);
+
+	for (i = 0, skipped = stats->total; i < stats->count; ++i) {
+		stack = stats->stacks[i].stack_handle;
+		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
+			sbuf[0] = 0;
+		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+		       stats->stacks[i].count, stats->total, sbuf);
+		skipped -= stats->stacks[i].count;
+	}
+
+	if (skipped)
+		pr_err("%s@%pK skipped reports about %d/%d users.\n",
+		       dir->name, dir, skipped, stats->total);
+
+	kfree(sbuf);
+
+	kfree(stats);
 }
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
diff --git a/lib/test_ref_tracker.c b/lib/test_ref_tracker.c
index 19d7dec70cc62f..49970a7c96f3f4 100644
--- a/lib/test_ref_tracker.c
+++ b/lib/test_ref_tracker.c
@@ -64,7 +64,7 @@ static int __init test_ref_tracker_init(void)
 {
 	int i;
 
-	ref_tracker_dir_init(&ref_dir, 100);
+	ref_tracker_dir_init(&ref_dir, 100, "selftest");
 
 	timer_setup(&test_ref_tracker_timer, test_ref_tracker_timer_func, 0);
 	mod_timer(&test_ref_tracker_timer, jiffies + 1);
diff --git a/net/core/dev.c b/net/core/dev.c
index 99d99b247bc976..8870eeb5a2ae1f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10635,7 +10635,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 	dev = PTR_ALIGN(p, NETDEV_ALIGN);
 	dev->padded = (char *)dev - (char *)p;
 
-	ref_tracker_dir_init(&dev->refcnt_tracker, 128);
+	ref_tracker_dir_init(&dev->refcnt_tracker, 128, name);
 #ifdef CONFIG_PCPU_DEV_REFCNT
 	dev->pcpu_refcnt = alloc_percpu(int);
 	if (!dev->pcpu_refcnt)
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 3e3598cd49f23e..f4183c4c1ec82f 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -308,7 +308,7 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_id);
 /* init code that must occur even if setup_net() is not called. */
 static __net_init void preinit_net(struct net *net)
 {
-	ref_tracker_dir_init(&net->notrefcnt_tracker, 128);
+	ref_tracker_dir_init(&net->notrefcnt_tracker, 128, "net notrefcnt");
 }
 
 /*
@@ -322,7 +322,7 @@ static __net_init int setup_net(struct net *net, struct user_namespace *user_ns)
 	LIST_HEAD(net_exit_list);
 
 	refcount_set(&net->ns.count, 1);
-	ref_tracker_dir_init(&net->refcnt_tracker, 128);
+	ref_tracker_dir_init(&net->refcnt_tracker, 128, "net refcnt");
 
 	refcount_set(&net->passive, 1);
 	get_random_bytes(&net->hash_mix, sizeof(u32));

-- 
2.34.1

[PATCH v9 3/4] lib/ref_tracker: add printing to memory buffer

[Andrzej Hajda]

Similar to stack_(depot|trace)_snprint the patch
adds helper to printing stats to memory buffer.
It will be helpful in case of debugfs.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 +++++++
 lib/ref_tracker.c           | 56 ++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 56 insertions(+), 8 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 19a69e7809d6c1..8eac4f3d52547c 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -46,6 +46,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size);
+
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp, gfp_t gfp);
 
@@ -74,6 +76,12 @@ static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 {
 }
 
+static inline int ref_tracker_dir_snprint(struct ref_tracker_dir *dir,
+					  char *buf, size_t size)
+{
+	return 0;
+}
+
 static inline int ref_tracker_alloc(struct ref_tracker_dir *dir,
 				    struct ref_tracker **trackerp,
 				    gfp_t gfp)
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index 2ffe79c90c1771..cce4614b07940f 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -62,8 +62,27 @@ ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 	return stats;
 }
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ostream {
+	char *buf;
+	int size, used;
+};
+
+#define pr_ostream(stream, fmt, args...) \
+({ \
+	struct ostream *_s = (stream); \
+\
+	if (!_s->buf) { \
+		pr_err(fmt, ##args); \
+	} else { \
+		int ret, len = _s->size - _s->used; \
+		ret = snprintf(_s->buf + _s->used, len, pr_fmt(fmt), ##args); \
+		_s->used += min(ret, len); \
+	} \
+})
+
+static void
+__ref_tracker_dir_pr_ostream(struct ref_tracker_dir *dir,
+			     unsigned int display_limit, struct ostream *s)
 {
 	struct ref_tracker_dir_stats *stats;
 	unsigned int i = 0, skipped;
@@ -77,8 +96,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 
 	stats = ref_tracker_get_stats(dir, display_limit);
 	if (IS_ERR(stats)) {
-		pr_err("%s@%pK: couldn't get stats, error %pe\n",
-		       dir->name, dir, stats);
+		pr_ostream(s, "%s@%pK: couldn't get stats, error %pe\n",
+			   dir->name, dir, stats);
 		return;
 	}
 
@@ -88,19 +107,27 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 		stack = stats->stacks[i].stack_handle;
 		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
 			sbuf[0] = 0;
-		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
-		       stats->stacks[i].count, stats->total, sbuf);
+		pr_ostream(s, "%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+			   stats->stacks[i].count, stats->total, sbuf);
 		skipped -= stats->stacks[i].count;
 	}
 
 	if (skipped)
-		pr_err("%s@%pK skipped reports about %d/%d users.\n",
-		       dir->name, dir, skipped, stats->total);
+		pr_ostream(s, "%s@%pK skipped reports about %d/%d users.\n",
+			   dir->name, dir, skipped, stats->total);
 
 	kfree(sbuf);
 
 	kfree(stats);
 }
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ostream os = {};
+
+	__ref_tracker_dir_pr_ostream(dir, display_limit, &os);
+}
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
@@ -114,6 +141,19 @@ void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 }
 EXPORT_SYMBOL(ref_tracker_dir_print);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size)
+{
+	struct ostream os = { .buf = buf, .size = size };
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	__ref_tracker_dir_pr_ostream(dir, 16, &os);
+	spin_unlock_irqrestore(&dir->lock, flags);
+
+	return os.used;
+}
+EXPORT_SYMBOL(ref_tracker_dir_snprint);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;

-- 
2.34.1

[PATCH v9 3/4] lib/ref_tracker: add printing to memory buffer

[Andrzej Hajda]

Similar to stack_(depot|trace)_snprint the patch
adds helper to printing stats to memory buffer.
It will be helpful in case of debugfs.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 +++++++
 lib/ref_tracker.c           | 56 ++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 56 insertions(+), 8 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 19a69e7809d6c1..8eac4f3d52547c 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -46,6 +46,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size);
+
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp, gfp_t gfp);
 
@@ -74,6 +76,12 @@ static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 {
 }
 
+static inline int ref_tracker_dir_snprint(struct ref_tracker_dir *dir,
+					  char *buf, size_t size)
+{
+	return 0;
+}
+
 static inline int ref_tracker_alloc(struct ref_tracker_dir *dir,
 				    struct ref_tracker **trackerp,
 				    gfp_t gfp)
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index 2ffe79c90c1771..cce4614b07940f 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -62,8 +62,27 @@ ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 	return stats;
 }
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ostream {
+	char *buf;
+	int size, used;
+};
+
+#define pr_ostream(stream, fmt, args...) \
+({ \
+	struct ostream *_s = (stream); \
+\
+	if (!_s->buf) { \
+		pr_err(fmt, ##args); \
+	} else { \
+		int ret, len = _s->size - _s->used; \
+		ret = snprintf(_s->buf + _s->used, len, pr_fmt(fmt), ##args); \
+		_s->used += min(ret, len); \
+	} \
+})
+
+static void
+__ref_tracker_dir_pr_ostream(struct ref_tracker_dir *dir,
+			     unsigned int display_limit, struct ostream *s)
 {
 	struct ref_tracker_dir_stats *stats;
 	unsigned int i = 0, skipped;
@@ -77,8 +96,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 
 	stats = ref_tracker_get_stats(dir, display_limit);
 	if (IS_ERR(stats)) {
-		pr_err("%s@%pK: couldn't get stats, error %pe\n",
-		       dir->name, dir, stats);
+		pr_ostream(s, "%s@%pK: couldn't get stats, error %pe\n",
+			   dir->name, dir, stats);
 		return;
 	}
 
@@ -88,19 +107,27 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 		stack = stats->stacks[i].stack_handle;
 		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
 			sbuf[0] = 0;
-		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
-		       stats->stacks[i].count, stats->total, sbuf);
+		pr_ostream(s, "%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+			   stats->stacks[i].count, stats->total, sbuf);
 		skipped -= stats->stacks[i].count;
 	}
 
 	if (skipped)
-		pr_err("%s@%pK skipped reports about %d/%d users.\n",
-		       dir->name, dir, skipped, stats->total);
+		pr_ostream(s, "%s@%pK skipped reports about %d/%d users.\n",
+			   dir->name, dir, skipped, stats->total);
 
 	kfree(sbuf);
 
 	kfree(stats);
 }
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ostream os = {};
+
+	__ref_tracker_dir_pr_ostream(dir, display_limit, &os);
+}
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
@@ -114,6 +141,19 @@ void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 }
 EXPORT_SYMBOL(ref_tracker_dir_print);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size)
+{
+	struct ostream os = { .buf = buf, .size = size };
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	__ref_tracker_dir_pr_ostream(dir, 16, &os);
+	spin_unlock_irqrestore(&dir->lock, flags);
+
+	return os.used;
+}
+EXPORT_SYMBOL(ref_tracker_dir_snprint);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;

-- 
2.34.1

[Intel-gfx] [PATCH v9 3/4] lib/ref_tracker: add printing to memory buffer

[Andrzej Hajda]

Similar to stack_(depot|trace)_snprint the patch
adds helper to printing stats to memory buffer.
It will be helpful in case of debugfs.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 include/linux/ref_tracker.h |  8 +++++++
 lib/ref_tracker.c           | 56 ++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 56 insertions(+), 8 deletions(-)

diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
index 19a69e7809d6c1..8eac4f3d52547c 100644
--- a/include/linux/ref_tracker.h
+++ b/include/linux/ref_tracker.h
@@ -46,6 +46,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 			   unsigned int display_limit);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size);
+
 int ref_tracker_alloc(struct ref_tracker_dir *dir,
 		      struct ref_tracker **trackerp, gfp_t gfp);
 
@@ -74,6 +76,12 @@ static inline void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 {
 }
 
+static inline int ref_tracker_dir_snprint(struct ref_tracker_dir *dir,
+					  char *buf, size_t size)
+{
+	return 0;
+}
+
 static inline int ref_tracker_alloc(struct ref_tracker_dir *dir,
 				    struct ref_tracker **trackerp,
 				    gfp_t gfp)
diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index 2ffe79c90c1771..cce4614b07940f 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -62,8 +62,27 @@ ref_tracker_get_stats(struct ref_tracker_dir *dir, unsigned int limit)
 	return stats;
 }
 
-void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
-				  unsigned int display_limit)
+struct ostream {
+	char *buf;
+	int size, used;
+};
+
+#define pr_ostream(stream, fmt, args...) \
+({ \
+	struct ostream *_s = (stream); \
+\
+	if (!_s->buf) { \
+		pr_err(fmt, ##args); \
+	} else { \
+		int ret, len = _s->size - _s->used; \
+		ret = snprintf(_s->buf + _s->used, len, pr_fmt(fmt), ##args); \
+		_s->used += min(ret, len); \
+	} \
+})
+
+static void
+__ref_tracker_dir_pr_ostream(struct ref_tracker_dir *dir,
+			     unsigned int display_limit, struct ostream *s)
 {
 	struct ref_tracker_dir_stats *stats;
 	unsigned int i = 0, skipped;
@@ -77,8 +96,8 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 
 	stats = ref_tracker_get_stats(dir, display_limit);
 	if (IS_ERR(stats)) {
-		pr_err("%s@%pK: couldn't get stats, error %pe\n",
-		       dir->name, dir, stats);
+		pr_ostream(s, "%s@%pK: couldn't get stats, error %pe\n",
+			   dir->name, dir, stats);
 		return;
 	}
 
@@ -88,19 +107,27 @@ void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
 		stack = stats->stacks[i].stack_handle;
 		if (sbuf && !stack_depot_snprint(stack, sbuf, STACK_BUF_SIZE, 4))
 			sbuf[0] = 0;
-		pr_err("%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
-		       stats->stacks[i].count, stats->total, sbuf);
+		pr_ostream(s, "%s@%pK has %d/%d users at\n%s\n", dir->name, dir,
+			   stats->stacks[i].count, stats->total, sbuf);
 		skipped -= stats->stacks[i].count;
 	}
 
 	if (skipped)
-		pr_err("%s@%pK skipped reports about %d/%d users.\n",
-		       dir->name, dir, skipped, stats->total);
+		pr_ostream(s, "%s@%pK skipped reports about %d/%d users.\n",
+			   dir->name, dir, skipped, stats->total);
 
 	kfree(sbuf);
 
 	kfree(stats);
 }
+
+void ref_tracker_dir_print_locked(struct ref_tracker_dir *dir,
+				  unsigned int display_limit)
+{
+	struct ostream os = {};
+
+	__ref_tracker_dir_pr_ostream(dir, display_limit, &os);
+}
 EXPORT_SYMBOL(ref_tracker_dir_print_locked);
 
 void ref_tracker_dir_print(struct ref_tracker_dir *dir,
@@ -114,6 +141,19 @@ void ref_tracker_dir_print(struct ref_tracker_dir *dir,
 }
 EXPORT_SYMBOL(ref_tracker_dir_print);
 
+int ref_tracker_dir_snprint(struct ref_tracker_dir *dir, char *buf, size_t size)
+{
+	struct ostream os = { .buf = buf, .size = size };
+	unsigned long flags;
+
+	spin_lock_irqsave(&dir->lock, flags);
+	__ref_tracker_dir_pr_ostream(dir, 16, &os);
+	spin_unlock_irqrestore(&dir->lock, flags);
+
+	return os.used;
+}
+EXPORT_SYMBOL(ref_tracker_dir_snprint);
+
 void ref_tracker_dir_exit(struct ref_tracker_dir *dir)
 {
 	struct ref_tracker *tracker, *n;

-- 
2.34.1

[PATCH v9 4/4] lib/ref_tracker: remove warnings in case of allocation failure

[Andrzej Hajda]

Library can handle allocation failures. To avoid allocation warnings
__GFP_NOWARN has been added everywhere. Moreover GFP_ATOMIC has been
replaced with GFP_NOWAIT in case of stack allocation on tracker free
call.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 lib/ref_tracker.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index cce4614b07940f..cf5609b1ca7936 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -189,7 +189,7 @@ int ref_tracker_alloc(struct ref_tracker_dir *dir,
 	unsigned long entries[REF_TRACKER_STACK_ENTRIES];
 	struct ref_tracker *tracker;
 	unsigned int nr_entries;
-	gfp_t gfp_mask = gfp;
+	gfp_t gfp_mask = gfp | __GFP_NOWARN;
 	unsigned long flags;
 
 	WARN_ON_ONCE(dir->dead);
@@ -237,7 +237,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 		return -EEXIST;
 	}
 	nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 1);
-	stack_handle = stack_depot_save(entries, nr_entries, GFP_ATOMIC);
+	stack_handle = stack_depot_save(entries, nr_entries,
+					GFP_NOWAIT | __GFP_NOWARN);
 
 	spin_lock_irqsave(&dir->lock, flags);
 	if (tracker->dead) {

-- 
2.34.1

[Intel-gfx] [PATCH v9 4/4] lib/ref_tracker: remove warnings in case of allocation failure

[Andrzej Hajda]

Library can handle allocation failures. To avoid allocation warnings
__GFP_NOWARN has been added everywhere. Moreover GFP_ATOMIC has been
replaced with GFP_NOWAIT in case of stack allocation on tracker free
call.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 lib/ref_tracker.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index cce4614b07940f..cf5609b1ca7936 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -189,7 +189,7 @@ int ref_tracker_alloc(struct ref_tracker_dir *dir,
 	unsigned long entries[REF_TRACKER_STACK_ENTRIES];
 	struct ref_tracker *tracker;
 	unsigned int nr_entries;
-	gfp_t gfp_mask = gfp;
+	gfp_t gfp_mask = gfp | __GFP_NOWARN;
 	unsigned long flags;
 
 	WARN_ON_ONCE(dir->dead);
@@ -237,7 +237,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 		return -EEXIST;
 	}
 	nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 1);
-	stack_handle = stack_depot_save(entries, nr_entries, GFP_ATOMIC);
+	stack_handle = stack_depot_save(entries, nr_entries,
+					GFP_NOWAIT | __GFP_NOWARN);
 
 	spin_lock_irqsave(&dir->lock, flags);
 	if (tracker->dead) {

-- 
2.34.1

[PATCH v9 4/4] lib/ref_tracker: remove warnings in case of allocation failure

[Andrzej Hajda]

Library can handle allocation failures. To avoid allocation warnings
__GFP_NOWARN has been added everywhere. Moreover GFP_ATOMIC has been
replaced with GFP_NOWAIT in case of stack allocation on tracker free
call.

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
---
 lib/ref_tracker.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
index cce4614b07940f..cf5609b1ca7936 100644
--- a/lib/ref_tracker.c
+++ b/lib/ref_tracker.c
@@ -189,7 +189,7 @@ int ref_tracker_alloc(struct ref_tracker_dir *dir,
 	unsigned long entries[REF_TRACKER_STACK_ENTRIES];
 	struct ref_tracker *tracker;
 	unsigned int nr_entries;
-	gfp_t gfp_mask = gfp;
+	gfp_t gfp_mask = gfp | __GFP_NOWARN;
 	unsigned long flags;
 
 	WARN_ON_ONCE(dir->dead);
@@ -237,7 +237,8 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
 		return -EEXIST;
 	}
 	nr_entries = stack_trace_save(entries, ARRAY_SIZE(entries), 1);
-	stack_handle = stack_depot_save(entries, nr_entries, GFP_ATOMIC);
+	stack_handle = stack_depot_save(entries, nr_entries,
+					GFP_NOWAIT | __GFP_NOWARN);
 
 	spin_lock_irqsave(&dir->lock, flags);
 	if (tracker->dead) {

-- 
2.34.1

[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915: use ref_tracker library for tracking wakerefs (rev10)

[Patchwork]

== Series Details ==

Series: drm/i915: use ref_tracker library for tracking wakerefs (rev10)
URL   : https://patchwork.freedesktop.org/series/100327/
State : warning

== Summary ==

Error: dim checkpatch failed
713ffb30f84c lib/ref_tracker: add unlocked leak print helper
76c74fb0c099 lib/ref_tracker: improve printing stats
e24bad806eb5 lib/ref_tracker: add printing to memory buffer
-:55: CHECK:MACRO_ARG_REUSE: Macro argument reuse 'fmt' - possible side-effects?
#55: FILE: lib/ref_tracker.c:70:
+#define pr_ostream(stream, fmt, args...) \
+({ \
+	struct ostream *_s = (stream); \
+\
+	if (!_s->buf) { \
+		pr_err(fmt, ##args); \
+	} else { \
+		int ret, len = _s->size - _s->used; \
+		ret = snprintf(_s->buf + _s->used, len, pr_fmt(fmt), ##args); \
+		_s->used += min(ret, len); \
+	} \
+})

total: 0 errors, 0 warnings, 1 checks, 109 lines checked
6480fb034dce lib/ref_tracker: remove warnings in case of allocation failure

[Intel-gfx] ✓ Fi.CI.BAT: success for drm/i915: use ref_tracker library for tracking wakerefs (rev10)

[Patchwork]

[-- Attachment #1: Type: text/plain, Size: 9547 bytes --]

== Series Details ==

Series: drm/i915: use ref_tracker library for tracking wakerefs (rev10)
URL   : https://patchwork.freedesktop.org/series/100327/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_13218 -> Patchwork_100327v10
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/index.html

Participating hosts (38 -> 37)
------------------------------

  Missing    (1): fi-kbl-soraka 

Known issues
------------

  Here are the changes found in Patchwork_100327v10 that come from known issues:

### CI changes ###

#### Possible fixes ####

  * boot:
    - fi-kbl-8809g:       [FAIL][1] ([i915#8293] / [i915#8298]) -> [PASS][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/fi-kbl-8809g/boot.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/boot.html

  

### IGT changes ###

#### Issues hit ####

  * igt@core_hotunplug@unbind-rebind:
    - fi-kbl-8809g:       NOTRUN -> [ABORT][3] ([i915#8298] / [i915#8299] / [i915#8397])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@core_hotunplug@unbind-rebind.html

  * igt@gem_huc_copy@huc-copy:
    - fi-kbl-8809g:       NOTRUN -> [SKIP][4] ([fdo#109271] / [i915#2190])
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@gem_huc_copy@huc-copy.html

  * igt@i915_pm_rpm@basic-pci-d3-state:
    - fi-hsw-4770:        [PASS][5] -> [SKIP][6] ([fdo#109271])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/fi-hsw-4770/igt@i915_pm_rpm@basic-pci-d3-state.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-hsw-4770/igt@i915_pm_rpm@basic-pci-d3-state.html

  * igt@i915_pm_rpm@basic-rte:
    - fi-hsw-4770:        [PASS][7] -> [FAIL][8] ([i915#7364])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/fi-hsw-4770/igt@i915_pm_rpm@basic-rte.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-hsw-4770/igt@i915_pm_rpm@basic-rte.html

  * igt@i915_selftest@live@gt_pm:
    - bat-rpls-2:         [PASS][9] -> [DMESG-FAIL][10] ([i915#4258] / [i915#7913])
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/bat-rpls-2/igt@i915_selftest@live@gt_pm.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-2/igt@i915_selftest@live@gt_pm.html

  * igt@i915_selftest@live@reset:
    - bat-rpls-2:         NOTRUN -> [ABORT][11] ([i915#4983] / [i915#7461] / [i915#7913] / [i915#7981] / [i915#8347])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-2/igt@i915_selftest@live@reset.html

  * igt@i915_selftest@live@slpc:
    - bat-rpls-1:         NOTRUN -> [DMESG-WARN][12] ([i915#6367])
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-1/igt@i915_selftest@live@slpc.html

  * igt@i915_suspend@basic-s3-without-i915:
    - bat-rpls-1:         NOTRUN -> [ABORT][13] ([i915#6687] / [i915#7978])
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-1/igt@i915_suspend@basic-s3-without-i915.html

  * igt@kms_addfb_basic@too-high:
    - fi-kbl-8809g:       NOTRUN -> [FAIL][14] ([i915#8296]) +2 similar issues
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@kms_addfb_basic@too-high.html

  * igt@kms_force_connector_basic@force-connector-state:
    - fi-kbl-8809g:       NOTRUN -> [DMESG-FAIL][15] ([i915#8299])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@kms_force_connector_basic@force-connector-state.html

  * igt@kms_force_connector_basic@force-edid:
    - fi-kbl-8809g:       NOTRUN -> [CRASH][16] ([i915#8299])
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@kms_force_connector_basic@force-edid.html

  * igt@kms_pipe_crc_basic@nonblocking-crc@pipe-c-dp-1:
    - bat-dg2-8:          [PASS][17] -> [FAIL][18] ([i915#7932])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/bat-dg2-8/igt@kms_pipe_crc_basic@nonblocking-crc@pipe-c-dp-1.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-dg2-8/igt@kms_pipe_crc_basic@nonblocking-crc@pipe-c-dp-1.html

  * igt@kms_pipe_crc_basic@read-crc:
    - bat-adlp-9:         NOTRUN -> [SKIP][19] ([i915#3546]) +1 similar issue
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-adlp-9/igt@kms_pipe_crc_basic@read-crc.html

  * igt@kms_psr@cursor_plane_move:
    - fi-kbl-8809g:       NOTRUN -> [SKIP][20] ([fdo#109271]) +59 similar issues
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@kms_psr@cursor_plane_move.html

  * igt@kms_setmode@basic-clone-single-crtc:
    - fi-kbl-8809g:       NOTRUN -> [SKIP][21] ([fdo#109271] / [i915#4579])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-kbl-8809g/igt@kms_setmode@basic-clone-single-crtc.html

  
#### Possible fixes ####

  * igt@i915_selftest@live@gt_heartbeat:
    - fi-apl-guc:         [DMESG-FAIL][22] ([i915#5334]) -> [PASS][23]
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/fi-apl-guc/igt@i915_selftest@live@gt_heartbeat.html
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-apl-guc/igt@i915_selftest@live@gt_heartbeat.html

  * igt@i915_selftest@live@hugepages:
    - fi-apl-guc:         [DMESG-FAIL][24] -> [PASS][25]
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/fi-apl-guc/igt@i915_selftest@live@hugepages.html
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/fi-apl-guc/igt@i915_selftest@live@hugepages.html

  * igt@i915_selftest@live@requests:
    - bat-rpls-2:         [ABORT][26] ([i915#4983] / [i915#7913]) -> [PASS][27]
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/bat-rpls-2/igt@i915_selftest@live@requests.html
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-2/igt@i915_selftest@live@requests.html

  * igt@i915_selftest@live@reset:
    - bat-rpls-1:         [ABORT][28] ([i915#4983] / [i915#7461] / [i915#7981] / [i915#8347] / [i915#8384]) -> [PASS][29]
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/bat-rpls-1/igt@i915_selftest@live@reset.html
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rpls-1/igt@i915_selftest@live@reset.html

  
#### Warnings ####

  * igt@kms_setmode@basic-clone-single-crtc:
    - bat-rplp-1:         [SKIP][30] ([i915#3555] / [i915#4579]) -> [ABORT][31] ([i915#4579] / [i915#8260])
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/bat-rplp-1/igt@kms_setmode@basic-clone-single-crtc.html
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/bat-rplp-1/igt@kms_setmode@basic-clone-single-crtc.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [i915#2190]: https://gitlab.freedesktop.org/drm/intel/issues/2190
  [i915#3546]: https://gitlab.freedesktop.org/drm/intel/issues/3546
  [i915#3555]: https://gitlab.freedesktop.org/drm/intel/issues/3555
  [i915#4258]: https://gitlab.freedesktop.org/drm/intel/issues/4258
  [i915#4423]: https://gitlab.freedesktop.org/drm/intel/issues/4423
  [i915#4579]: https://gitlab.freedesktop.org/drm/intel/issues/4579
  [i915#4983]: https://gitlab.freedesktop.org/drm/intel/issues/4983
  [i915#5334]: https://gitlab.freedesktop.org/drm/intel/issues/5334
  [i915#6367]: https://gitlab.freedesktop.org/drm/intel/issues/6367
  [i915#6687]: https://gitlab.freedesktop.org/drm/intel/issues/6687
  [i915#7364]: https://gitlab.freedesktop.org/drm/intel/issues/7364
  [i915#7461]: https://gitlab.freedesktop.org/drm/intel/issues/7461
  [i915#7913]: https://gitlab.freedesktop.org/drm/intel/issues/7913
  [i915#7932]: https://gitlab.freedesktop.org/drm/intel/issues/7932
  [i915#7978]: https://gitlab.freedesktop.org/drm/intel/issues/7978
  [i915#7981]: https://gitlab.freedesktop.org/drm/intel/issues/7981
  [i915#8260]: https://gitlab.freedesktop.org/drm/intel/issues/8260
  [i915#8293]: https://gitlab.freedesktop.org/drm/intel/issues/8293
  [i915#8296]: https://gitlab.freedesktop.org/drm/intel/issues/8296
  [i915#8298]: https://gitlab.freedesktop.org/drm/intel/issues/8298
  [i915#8299]: https://gitlab.freedesktop.org/drm/intel/issues/8299
  [i915#8347]: https://gitlab.freedesktop.org/drm/intel/issues/8347
  [i915#8384]: https://gitlab.freedesktop.org/drm/intel/issues/8384
  [i915#8397]: https://gitlab.freedesktop.org/drm/intel/issues/8397


Build changes
-------------

  * Linux: CI_DRM_13218 -> Patchwork_100327v10

  CI-20190529: 20190529
  CI_DRM_13218: 42043133c83c69e384fb66060c97b093df67aed7 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_7317: c902b72df45aa49faa38205bc5be3c748d33a3e0 @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_100327v10: 42043133c83c69e384fb66060c97b093df67aed7 @ git://anongit.freedesktop.org/gfx-ci/linux


### Linux commits

bf3f193bf394 lib/ref_tracker: remove warnings in case of allocation failure
3d7ad374b469 lib/ref_tracker: add printing to memory buffer
41f2eb82f464 lib/ref_tracker: improve printing stats
4ee23c6bc055 lib/ref_tracker: add unlocked leak print helper

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/index.html

[-- Attachment #2: Type: text/html, Size: 11598 bytes --]

Re: [PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Simon Horman]

On Fri, Jun 02, 2023 at 12:21:34PM +0200, Andrzej Hajda wrote:
> In case the library is tracking busy subsystem, simply
> printing stack for every active reference will spam log
> with long, hard to read, redundant stack traces. To improve
> readabilty following changes have been made:

Hi Andrzej,

in case you have to respin for some other reason, you may want to consider:

  readabilty -> readability

...

Re: [PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Simon Horman]

On Fri, Jun 02, 2023 at 12:21:34PM +0200, Andrzej Hajda wrote:
> In case the library is tracking busy subsystem, simply
> printing stack for every active reference will spam log
> with long, hard to read, redundant stack traces. To improve
> readabilty following changes have been made:

Hi Andrzej,

in case you have to respin for some other reason, you may want to consider:

  readabilty -> readability

...

Re: [Intel-gfx] [PATCH v9 2/4] lib/ref_tracker: improve printing stats

[Simon Horman]

On Fri, Jun 02, 2023 at 12:21:34PM +0200, Andrzej Hajda wrote:
> In case the library is tracking busy subsystem, simply
> printing stack for every active reference will spam log
> with long, hard to read, redundant stack traces. To improve
> readabilty following changes have been made:

Hi Andrzej,

in case you have to respin for some other reason, you may want to consider:

  readabilty -> readability

...

[Intel-gfx] ✓ Fi.CI.IGT: success for drm/i915: use ref_tracker library for tracking wakerefs (rev10)

[Patchwork]

[-- Attachment #1: Type: text/plain, Size: 10217 bytes --]

== Series Details ==

Series: drm/i915: use ref_tracker library for tracking wakerefs (rev10)
URL   : https://patchwork.freedesktop.org/series/100327/
State : success

== Summary ==

CI Bug Log - changes from CI_DRM_13218_full -> Patchwork_100327v10_full
====================================================

Summary
-------

  **SUCCESS**

  No regressions found.

  

Participating hosts (7 -> 7)
------------------------------

  No changes in participating hosts

Known issues
------------

  Here are the changes found in Patchwork_100327v10_full that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_fair@basic-pace-share@rcs0:
    - shard-apl:          [PASS][1] -> [FAIL][2] ([i915#2842])
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-apl3/igt@gem_exec_fair@basic-pace-share@rcs0.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-apl7/igt@gem_exec_fair@basic-pace-share@rcs0.html

  * igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size:
    - shard-apl:          [PASS][3] -> [FAIL][4] ([i915#2346])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-apl7/igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-apl1/igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size.html

  * igt@kms_flip@2x-flip-vs-expired-vblank-interruptible@ab-hdmi-a1-hdmi-a2:
    - shard-glk:          [PASS][5] -> [FAIL][6] ([i915#79])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-glk2/igt@kms_flip@2x-flip-vs-expired-vblank-interruptible@ab-hdmi-a1-hdmi-a2.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-glk3/igt@kms_flip@2x-flip-vs-expired-vblank-interruptible@ab-hdmi-a1-hdmi-a2.html

  * igt@kms_hdmi_inject@inject-audio:
    - shard-snb:          [PASS][7] -> [SKIP][8] ([fdo#109271])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-snb4/igt@kms_hdmi_inject@inject-audio.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-snb1/igt@kms_hdmi_inject@inject-audio.html

  * igt@kms_plane_scaling@planes-downscale-factor-0-75-unity-scaling@pipe-a-vga-1:
    - shard-snb:          NOTRUN -> [SKIP][9] ([fdo#109271]) +16 similar issues
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-snb6/igt@kms_plane_scaling@planes-downscale-factor-0-75-unity-scaling@pipe-a-vga-1.html

  * igt@kms_plane_scaling@planes-upscale-factor-0-25-downscale-factor-0-25@pipe-b-hdmi-a-1:
    - shard-snb:          NOTRUN -> [SKIP][10] ([fdo#109271] / [i915#4579]) +12 similar issues
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-snb1/igt@kms_plane_scaling@planes-upscale-factor-0-25-downscale-factor-0-25@pipe-b-hdmi-a-1.html

  
#### Possible fixes ####

  * igt@gem_ctx_freq@sysfs:
    - {shard-dg1}:        [FAIL][11] ([i915#6786]) -> [PASS][12]
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-dg1-19/igt@gem_ctx_freq@sysfs.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-dg1-17/igt@gem_ctx_freq@sysfs.html

  * igt@gem_exec_fair@basic-none-solo@rcs0:
    - shard-apl:          [FAIL][13] ([i915#2842]) -> [PASS][14]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-apl7/igt@gem_exec_fair@basic-none-solo@rcs0.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-apl2/igt@gem_exec_fair@basic-none-solo@rcs0.html

  * igt@i915_pm_rpm@modeset-non-lpsp:
    - {shard-dg1}:        [SKIP][15] ([i915#1397]) -> [PASS][16]
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-dg1-19/igt@i915_pm_rpm@modeset-non-lpsp.html
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-dg1-17/igt@i915_pm_rpm@modeset-non-lpsp.html

  * igt@kms_big_fb@y-tiled-32bpp-rotate-90:
    - shard-glk:          [DMESG-WARN][17] -> [PASS][18]
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-glk9/igt@kms_big_fb@y-tiled-32bpp-rotate-90.html
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-glk9/igt@kms_big_fb@y-tiled-32bpp-rotate-90.html

  * igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size:
    - shard-glk:          [FAIL][19] ([i915#2346]) -> [PASS][20]
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-glk8/igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size.html
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-glk8/igt@kms_cursor_legacy@flip-vs-cursor-atomic-transitions-varying-size.html

  * igt@kms_cursor_legacy@single-move@pipe-b:
    - {shard-dg1}:        [INCOMPLETE][21] ([i915#8011] / [i915#8347]) -> [PASS][22] +1 similar issue
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-dg1-19/igt@kms_cursor_legacy@single-move@pipe-b.html
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-dg1-17/igt@kms_cursor_legacy@single-move@pipe-b.html

  * igt@kms_flip@flip-vs-expired-vblank-interruptible@a-dp1:
    - shard-apl:          [FAIL][23] ([i915#79]) -> [PASS][24]
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13218/shard-apl3/igt@kms_flip@flip-vs-expired-vblank-interruptible@a-dp1.html
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/shard-apl1/igt@kms_flip@flip-vs-expired-vblank-interruptible@a-dp1.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109285]: https://bugs.freedesktop.org/show_bug.cgi?id=109285
  [fdo#111825]: https://bugs.freedesktop.org/show_bug.cgi?id=111825
  [i915#1072]: https://gitlab.freedesktop.org/drm/intel/issues/1072
  [i915#1397]: https://gitlab.freedesktop.org/drm/intel/issues/1397
  [i915#2346]: https://gitlab.freedesktop.org/drm/intel/issues/2346
  [i915#2527]: https://gitlab.freedesktop.org/drm/intel/issues/2527
  [i915#2575]: https://gitlab.freedesktop.org/drm/intel/issues/2575
  [i915#2587]: https://gitlab.freedesktop.org/drm/intel/issues/2587
  [i915#2672]: https://gitlab.freedesktop.org/drm/intel/issues/2672
  [i915#2681]: https://gitlab.freedesktop.org/drm/intel/issues/2681
  [i915#2842]: https://gitlab.freedesktop.org/drm/intel/issues/2842
  [i915#3281]: https://gitlab.freedesktop.org/drm/intel/issues/3281
  [i915#3282]: https://gitlab.freedesktop.org/drm/intel/issues/3282
  [i915#3297]: https://gitlab.freedesktop.org/drm/intel/issues/3297
  [i915#3458]: https://gitlab.freedesktop.org/drm/intel/issues/3458
  [i915#3539]: https://gitlab.freedesktop.org/drm/intel/issues/3539
  [i915#3555]: https://gitlab.freedesktop.org/drm/intel/issues/3555
  [i915#3591]: https://gitlab.freedesktop.org/drm/intel/issues/3591
  [i915#3638]: https://gitlab.freedesktop.org/drm/intel/issues/3638
  [i915#3689]: https://gitlab.freedesktop.org/drm/intel/issues/3689
  [i915#3742]: https://gitlab.freedesktop.org/drm/intel/issues/3742
  [i915#3804]: https://gitlab.freedesktop.org/drm/intel/issues/3804
  [i915#404]: https://gitlab.freedesktop.org/drm/intel/issues/404
  [i915#4070]: https://gitlab.freedesktop.org/drm/intel/issues/4070
  [i915#4077]: https://gitlab.freedesktop.org/drm/intel/issues/4077
  [i915#4078]: https://gitlab.freedesktop.org/drm/intel/issues/4078
  [i915#4083]: https://gitlab.freedesktop.org/drm/intel/issues/4083
  [i915#4098]: https://gitlab.freedesktop.org/drm/intel/issues/4098
  [i915#4103]: https://gitlab.freedesktop.org/drm/intel/issues/4103
  [i915#4213]: https://gitlab.freedesktop.org/drm/intel/issues/4213
  [i915#4270]: https://gitlab.freedesktop.org/drm/intel/issues/4270
  [i915#4387]: https://gitlab.freedesktop.org/drm/intel/issues/4387
  [i915#4538]: https://gitlab.freedesktop.org/drm/intel/issues/4538
  [i915#4565]: https://gitlab.freedesktop.org/drm/intel/issues/4565
  [i915#4579]: https://gitlab.freedesktop.org/drm/intel/issues/4579
  [i915#4816]: https://gitlab.freedesktop.org/drm/intel/issues/4816
  [i915#4833]: https://gitlab.freedesktop.org/drm/intel/issues/4833
  [i915#4860]: https://gitlab.freedesktop.org/drm/intel/issues/4860
  [i915#5176]: https://gitlab.freedesktop.org/drm/intel/issues/5176
  [i915#5235]: https://gitlab.freedesktop.org/drm/intel/issues/5235
  [i915#5286]: https://gitlab.freedesktop.org/drm/intel/issues/5286
  [i915#5289]: https://gitlab.freedesktop.org/drm/intel/issues/5289
  [i915#5354]: https://gitlab.freedesktop.org/drm/intel/issues/5354
  [i915#6095]: https://gitlab.freedesktop.org/drm/intel/issues/6095
  [i915#6786]: https://gitlab.freedesktop.org/drm/intel/issues/6786
  [i915#7461]: https://gitlab.freedesktop.org/drm/intel/issues/7461
  [i915#7561]: https://gitlab.freedesktop.org/drm/intel/issues/7561
  [i915#7711]: https://gitlab.freedesktop.org/drm/intel/issues/7711
  [i915#7828]: https://gitlab.freedesktop.org/drm/intel/issues/7828
  [i915#79]: https://gitlab.freedesktop.org/drm/intel/issues/79
  [i915#7975]: https://gitlab.freedesktop.org/drm/intel/issues/7975
  [i915#8011]: https://gitlab.freedesktop.org/drm/intel/issues/8011
  [i915#8213]: https://gitlab.freedesktop.org/drm/intel/issues/8213
  [i915#8234]: https://gitlab.freedesktop.org/drm/intel/issues/8234
  [i915#8311]: https://gitlab.freedesktop.org/drm/intel/issues/8311
  [i915#8347]: https://gitlab.freedesktop.org/drm/intel/issues/8347
  [i915#8398]: https://gitlab.freedesktop.org/drm/intel/issues/8398


Build changes
-------------

  * Linux: CI_DRM_13218 -> Patchwork_100327v10

  CI-20190529: 20190529
  CI_DRM_13218: 42043133c83c69e384fb66060c97b093df67aed7 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_7317: c902b72df45aa49faa38205bc5be3c748d33a3e0 @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_100327v10: 42043133c83c69e384fb66060c97b093df67aed7 @ git://anongit.freedesktop.org/gfx-ci/linux
  piglit_4509: fdc5a4ca11124ab8413c7988896eec4c97336694 @ git://anongit.freedesktop.org/piglit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_100327v10/index.html

[-- Attachment #2: Type: text/html, Size: 8147 bytes --]

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Jakub Kicinski]

On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.

FWIW I'll try to merge these on top of the -rc4 tag so
with a bit of luck you should be able to cross merge cleanly
into another -next tree.

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Jakub Kicinski]

On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.

FWIW I'll try to merge these on top of the -rc4 tag so
with a bit of luck you should be able to cross merge cleanly
into another -next tree.

Re: [Intel-gfx] [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Jakub Kicinski]

On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.

FWIW I'll try to merge these on top of the -rc4 tag so
with a bit of luck you should be able to cross merge cleanly
into another -next tree.

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 02 Jun 2023 12:21:32 +0200 you wrote:
> Hi Jakub,
> 
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.
> 
> Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
> 
> [...]

Here is the summary with links:
  - [v9,1/4] lib/ref_tracker: add unlocked leak print helper
    https://git.kernel.org/netdev/net-next/c/7a113ff63559
  - [v9,2/4] lib/ref_tracker: improve printing stats
    https://git.kernel.org/netdev/net-next/c/b6d7c0eb2dcb
  - [v9,3/4] lib/ref_tracker: add printing to memory buffer
    https://git.kernel.org/netdev/net-next/c/227c6c832303
  - [v9,4/4] lib/ref_tracker: remove warnings in case of allocation failure
    https://git.kernel.org/netdev/net-next/c/acd8f0e5d727

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 02 Jun 2023 12:21:32 +0200 you wrote:
> Hi Jakub,
> 
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.
> 
> Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
> 
> [...]

Here is the summary with links:
  - [v9,1/4] lib/ref_tracker: add unlocked leak print helper
    https://git.kernel.org/netdev/net-next/c/7a113ff63559
  - [v9,2/4] lib/ref_tracker: improve printing stats
    https://git.kernel.org/netdev/net-next/c/b6d7c0eb2dcb
  - [v9,3/4] lib/ref_tracker: add printing to memory buffer
    https://git.kernel.org/netdev/net-next/c/227c6c832303
  - [v9,4/4] lib/ref_tracker: remove warnings in case of allocation failure
    https://git.kernel.org/netdev/net-next/c/acd8f0e5d727

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [Intel-gfx] [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 02 Jun 2023 12:21:32 +0200 you wrote:
> Hi Jakub,
> 
> This is reviewed series of ref_tracker patches, ready to merge
> via network tree, rebased on net-next/main.
> i915 patches will be merged later via intel-gfx tree.
> 
> Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
> 
> [...]

Here is the summary with links:
  - [v9,1/4] lib/ref_tracker: add unlocked leak print helper
    https://git.kernel.org/netdev/net-next/c/7a113ff63559
  - [v9,2/4] lib/ref_tracker: improve printing stats
    https://git.kernel.org/netdev/net-next/c/b6d7c0eb2dcb
  - [v9,3/4] lib/ref_tracker: add printing to memory buffer
    https://git.kernel.org/netdev/net-next/c/227c6c832303
  - [v9,4/4] lib/ref_tracker: remove warnings in case of allocation failure
    https://git.kernel.org/netdev/net-next/c/acd8f0e5d727

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

On 06.06.2023 00:33, Jakub Kicinski wrote:
> On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
>> This is reviewed series of ref_tracker patches, ready to merge
>> via network tree, rebased on net-next/main.
>> i915 patches will be merged later via intel-gfx tree.
> FWIW I'll try to merge these on top of the -rc4 tag so
> with a bit of luck you should be able to cross merge cleanly
> into another -next tree.

Thanks.

Regards
Andrzej

Re: [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

On 06.06.2023 00:33, Jakub Kicinski wrote:
> On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
>> This is reviewed series of ref_tracker patches, ready to merge
>> via network tree, rebased on net-next/main.
>> i915 patches will be merged later via intel-gfx tree.
> FWIW I'll try to merge these on top of the -rc4 tag so
> with a bit of luck you should be able to cross merge cleanly
> into another -next tree.

Thanks.

Regards
Andrzej

Re: [Intel-gfx] [PATCH v9 0/4] drm/i915: use ref_tracker library for tracking wakerefs

[Andrzej Hajda]

On 06.06.2023 00:33, Jakub Kicinski wrote:
> On Fri, 02 Jun 2023 12:21:32 +0200 Andrzej Hajda wrote:
>> This is reviewed series of ref_tracker patches, ready to merge
>> via network tree, rebased on net-next/main.
>> i915 patches will be merged later via intel-gfx tree.
> FWIW I'll try to merge these on top of the -rc4 tag so
> with a bit of luck you should be able to cross merge cleanly
> into another -next tree.

Thanks.

Regards
Andrzej