v5.18-rt11
Subsystems (2)
Dear RT folks!
I'm pleased to announce the v5.18-rt11 patch set.
Changes since v5.18-rt10:
- Dropping preempt_check_resched_rt() checks. The checks were added to ensure a possible wake up which could be missed if the wakeup happens on the same CPU with disabled interrupts. This has been reduced to a ksoftirqd wake and is no longer needed because a softirq-raise won't wake ksoftirqd if the caller has BH disabled. The remaining two caller (based on audit, htb_work_func() and dev_cpu_dead()) acquire/release a lock "soon" which provides the needed scheduling point.
Known issues
- Valentin Schneider reported a few splats on ARM64, see
https://lkml.kernel.org/r/[email protected]
The delta patch against v5.18-rt10 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.18/incr/patch-5.18-rt10-rt11.patch.xz
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v5.18-rt11
The RT patch against v5.18 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.18/older/patch-5.18-rt11.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.18/older/patches-5.18-rt11.tar.xz
Sebastian
include/linux/preempt.h +0 -7
@@ -232,12 +232,6 @@ do { \#define preempt_enable_no_resched () sched_preempt_enable_no_resched() -#ifndef CONFIG_PREEMPT_RT -# define preempt_check_resched_rt () barrier(); -#else -# define preempt_check_resched_rt () preempt_check_resched() -#endif -#define preemptible () (preempt_count() == 0 && !irqs_disabled())#ifdef CONFIG_PREEMPTION
@@ -324,7 +318,6 @@ do { \#define preempt_disable_notrace () barrier()#define preempt_enable_no_resched_notrace () barrier()#define preempt_enable_notrace () barrier() -#define preempt_check_resched_rt () barrier()#define preemptible () 0#define preempt_lazy_disable () barrier()
localversion-rt +1 -1
@@ -1 +1 @@ --rt10 +-rt11
net/core/dev.c +0 -6
@@ -3024,7 +3024,6 @@ static void __netif_reschedule(struct Qdisc *q) sd->output_queue_tailp = &q->next_sched;raise_softirq_irqoff (NET_TX_SOFTIRQ );local_irq_restore (flags); -preempt_check_resched_rt (); }void __netif_schedule (struct Qdisc *q)
@@ -3087,7 +3086,6 @@ void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason)__this_cpu_write (softnet_data.completion_queue, skb);raise_softirq_irqoff (NET_TX_SOFTIRQ );local_irq_restore (flags); -preempt_check_resched_rt (); }EXPORT_SYMBOL (__dev_kfree_skb_irq);
@@ -5809,14 +5807,12 @@ static void net_rps_action_and_irq_enable(struct softnet_data *sd) sd->rps_ipi_list =NULL ;local_irq_enable (); -preempt_check_resched_rt ();/* Send pending IPI's to kick RPS processing on remote cpus. */ net_rps_send_ipi(remsd); } else#endif local_irq_enable (); -preempt_check_resched_rt (); }static bool sd_has_rps_ipi_waiting (struct softnet_data *sd)
@@ -5892,7 +5888,6 @@ void __napi_schedule(struct napi_struct *n)local_irq_save (flags);____napi_schedule (this_cpu_ptr (&softnet_data), n);local_irq_restore (flags); -preempt_check_resched_rt (); }EXPORT_SYMBOL (__napi_schedule);
@@ -11001,7 +10996,6 @@ static int dev_cpu_dead(unsigned int oldcpu)raise_softirq_irqoff (NET_TX_SOFTIRQ );local_irq_enable (); -preempt_check_resched_rt ();#ifdef CONFIG_RPS remsd = oldsd->rps_ipi_list;