[ Sasha's backport helper bot ]
Hi,
The upstream commit SHA1 provided is correct: 5c9a9ca44fda41c5e82f50efced5297a9c19760d
WARNING: Author mismatch between patch and upstream commit:
Backport author: Krister Johansen <kjlx@xxxxxxxxxxxxxxxxxx>
Commit author: Paul E. McKenney <paulmck@xxxxxxxxxx>
Status in newer kernel trees:
6.12.y | Present (exact SHA1)
6.11.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)
6.1.y | Present (exact SHA1)
5.15.y | Not found
5.10.y | Not found
Note: The patch differs from the upstream commit:
---
--- - 2024-11-22 08:26:15.770984330 -0500
+++ /tmp/tmp.eKXYnEofof 2024-11-22 08:26:15.765204063 -0500
@@ -1,3 +1,5 @@
+commit 5c9a9ca44fda41c5e82f50efced5297a9c19760d upstream
+
Any idle task corresponding to an offline CPU is in an RCU Tasks Trace
quiescent state. This commit causes rcu_tasks_trace_postscan() to ignore
idle tasks for offline CPUs, which it can do safely due to CPU-hotplug
@@ -10,15 +12,16 @@
Cc: Andrii Nakryiko <andrii@xxxxxxxxxx>
Cc: Martin KaFai Lau <kafai@xxxxxx>
Cc: KP Singh <kpsingh@xxxxxxxxxx>
+Signed-off-by: Krister Johansen <kjlx@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tasks.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
-index 8fe78a7fecafd..ec68bfe98c958 100644
+index bede3a4f108e..ea45a2d53a99 100644
--- a/kernel/rcu/tasks.h
+++ b/kernel/rcu/tasks.h
-@@ -1451,7 +1451,7 @@ static void rcu_tasks_trace_postscan(struct list_head *hop)
+@@ -1007,7 +1007,7 @@ static void rcu_tasks_trace_postscan(struct list_head *hop)
{
int cpu;
@@ -27,3 +30,6 @@
rcu_tasks_trace_pertask(idle_task(cpu), hop);
// Re-enable CPU hotplug now that the tasklist scan has completed.
+--
+2.25.1
+
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.10.y | Failed | N/A |
