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-rw-r--r--debian/patches-rt/0006-workqueue-Manually-break-affinity-on-hotplug.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/debian/patches-rt/0006-workqueue-Manually-break-affinity-on-hotplug.patch b/debian/patches-rt/0006-workqueue-Manually-break-affinity-on-hotplug.patch
new file mode 100644
index 000000000..7eb185ce2
--- /dev/null
+++ b/debian/patches-rt/0006-workqueue-Manually-break-affinity-on-hotplug.patch
@@ -0,0 +1,34 @@
+From e3372f0d43a35f1070d1689e6aa1f84d6cd9784b Mon Sep 17 00:00:00 2001
+From: Peter Zijlstra <peterz@infradead.org>
+Date: Fri, 23 Oct 2020 12:12:03 +0200
+Subject: [PATCH 006/323] workqueue: Manually break affinity on hotplug
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz
+
+Don't rely on the scheduler to force break affinity for us -- it will
+stop doing that for per-cpu-kthreads.
+
+Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
+Acked-by: Tejun Heo <tj@kernel.org>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ kernel/workqueue.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/kernel/workqueue.c b/kernel/workqueue.c
+index 63140e4dd5df..7c14773dc4c4 100644
+--- a/kernel/workqueue.c
++++ b/kernel/workqueue.c
+@@ -4941,6 +4941,10 @@ static void unbind_workers(int cpu)
+ pool->flags |= POOL_DISASSOCIATED;
+
+ raw_spin_unlock_irq(&pool->lock);
++
++ for_each_pool_worker(worker, pool)
++ WARN_ON_ONCE(set_cpus_allowed_ptr(worker->task, cpu_active_mask) < 0);
++
+ mutex_unlock(&wq_pool_attach_mutex);
+
+ /*
+--
+2.43.0
+