diff options
Diffstat (limited to '0106-lib-irq_poll-Declare_IRQ_POLL_softirq_vector_as_ksoftirqd-parking_safe.patch')
-rw-r--r-- | 0106-lib-irq_poll-Declare_IRQ_POLL_softirq_vector_as_ksoftirqd-parking_safe.patch | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/0106-lib-irq_poll-Declare_IRQ_POLL_softirq_vector_as_ksoftirqd-parking_safe.patch b/0106-lib-irq_poll-Declare_IRQ_POLL_softirq_vector_as_ksoftirqd-parking_safe.patch deleted file mode 100644 index 64c483563d02..000000000000 --- a/0106-lib-irq_poll-Declare_IRQ_POLL_softirq_vector_as_ksoftirqd-parking_safe.patch +++ /dev/null @@ -1,53 +0,0 @@ -From 43a520143b091d79168ca3284aa23501c09f711e Mon Sep 17 00:00:00 2001 -From: Frederic Weisbecker <frederic@kernel.org> -Date: Tue, 8 Feb 2022 17:16:35 +0100 -Subject: [PATCH] lib/irq_poll: Declare IRQ_POLL softirq vector as - ksoftirqd-parking safe - -The following warning may appear while setting a CPU down: - - NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #20!!! - -The IRQ_POLL_SOFTIRQ vector can be raised during the hotplug cpu_down() -path after ksoftirqd is parked and before the CPU actually dies. However -this is handled afterward at the CPUHP_IRQ_POLL_DEAD stage where the -queue gets migrated. - -Hence this warning can be considered spurious and the vector can join -the "hotplug-safe" list. - -Reported-and-tested-by: Paul Menzel <pmenzel@molgen.mpg.de> -Signed-off-by: Frederic Weisbecker <frederic@kernel.org> -Cc: Thomas Gleixner <tglx@linutronix.de> -Cc: Peter Zijlstra <peterz@infradead.org> -Cc: Paul E. McKenney <paulmck@kernel.org> -Cc: Paul Menzel <pmenzel@molgen.mpg.de> ---- - include/linux/interrupt.h | 11 +++++++---- - 1 file changed, 7 insertions(+), 4 deletions(-) - -diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h -index 9613326d2f8af1..f40754caaefa43 100644 ---- a/include/linux/interrupt.h -+++ b/include/linux/interrupt.h -@@ -580,12 +580,15 @@ enum - }; - - /* -- * Ignoring the RCU vector after ksoftirqd is parked is fine -- * because: -- * 1) rcutree_migrate_callbacks() takes care of the queue. -+ * The following vectors can be safely ignored after ksoftirqd is parked: -+ * -+ * _ RCU: -+ * 1) rcutree_migrate_callbacks() migrates the queue. - * 2) rcu_report_dead() reports the final quiescent states. -+ * -+ * _ IRQ_POLL: irq_poll_cpu_dead() migrates the queue - */ --#define SOFTIRQ_HOTPLUG_SAFE_MASK (BIT(RCU_SOFTIRQ)) -+#define SOFTIRQ_HOTPLUG_SAFE_MASK (BIT(RCU_SOFTIRQ) | BIT(IRQ_POLL_SOFTIRQ)) - - /* map softirq index to softirq name. update 'softirq_to_name' in - * kernel/softirq.c when adding a new softirq. - |