Hello RT Folks! I'm pleased to announce the 4.1.46-rt52 stable release. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git branch: v4.1-rt Head SHA1: 6e737a91c1ce923d4e10db831e14cfef9a2459cc Or to build 4.1.46-rt52 directly, the following patches should be applied: http://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.tar.xz http://www.kernel.org/pub/linux/kernel/v4.x/patch-4.1.46.xz http://www.kernel.org/pub/linux/kernel/projects/rt/4.1/patch-4.1.46-rt52.patch.xz You can also build from 4.1.46-rt51 by applying the incremental patch: http://www.kernel.org/pub/linux/kernel/projects/rt/4.1/incr/patch-4.1.46-rt51-rt52.patch.xz Enjoy! Julia Changes from v4.1.46-rt51: --- Julia Cartwright (2): workqueue: fixup rcu check for RT Linux 4.1.46-rt52 Sebastian Andrzej Siewior (2): PM / CPU: replace raw_notifier with atomic_notifier (fixup) kernel/hrtimer: migrate deferred timer on CPU down --- kernel/cpu_pm.c | 7 +++++++ kernel/time/hrtimer.c | 5 +++++ kernel/workqueue.c | 2 +- localversion-rt | 2 +- 4 files changed, 14 insertions(+), 2 deletions(-) --- diff --git a/kernel/cpu_pm.c b/kernel/cpu_pm.c index 9da42f83ee03..d1d1c3961553 100644 --- a/kernel/cpu_pm.c +++ b/kernel/cpu_pm.c @@ -28,8 +28,15 @@ static int cpu_pm_notify(enum cpu_pm_event event, int nr_to_call, int *nr_calls) { int ret; + /* + * __atomic_notifier_call_chain has a RCU read critical section, which + * could be disfunctional in cpu idle. Copy RCU_NONIDLE code to let + * RCU know this. + */ + rcu_irq_enter_irqson(); ret = __atomic_notifier_call_chain(&cpu_pm_notifier_chain, event, NULL, nr_to_call, nr_calls); + rcu_irq_exit_irqson(); return notifier_to_errno(ret); } diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 2c6be169bdc7..75c990b00525 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1951,6 +1951,11 @@ static void migrate_hrtimer_list(struct hrtimer_clock_base *old_base, /* Clear the migration state bit */ timer->state &= ~HRTIMER_STATE_MIGRATE; } +#ifdef CONFIG_PREEMPT_RT_BASE + list_splice_tail(&old_base->expired, &new_base->expired); + if (!list_empty(&new_base->expired)) + raise_softirq_irqoff(HRTIMER_SOFTIRQ); +#endif } static void migrate_hrtimers(int scpu) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 6bdcab98501c..90e261c8811e 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -363,7 +363,7 @@ static void workqueue_sysfs_unregister(struct workqueue_struct *wq); "RCU or wq->mutex should be held") #define assert_rcu_or_wq_mutex_or_pool_mutex(wq) \ - rcu_lockdep_assert(rcu_read_lock_sched_held() || \ + rcu_lockdep_assert(rcu_read_lock_held() || \ lockdep_is_held(&wq->mutex) || \ lockdep_is_held(&wq_pool_mutex), \ "sched RCU, wq->mutex or wq_pool_mutex should be held") diff --git a/localversion-rt b/localversion-rt index 75493460c41f..66a5ed8bf3d7 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt51 +-rt52 -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
