Dear RT Folks, I'm pleased to announce the 3.12.22-rt35 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: v3.12-rt Head SHA1: 3d9a32ec9382bfb61fdc45c1eb038dc514cd0bfb Or to build 3.12.22-rt35 directly, the following patches should be applied: http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.12.tar.xz http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.12.22.xz http://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patch-3.12.22-rt35.patch.xz You can also build from 3.12.22-rt34 by applying the incremental patch: http://www.kernel.org/pub/linux/kernel/projects/rt/3.12/incr/patch-3.12.22-rt34-rt35.patch.xz Enjoy, -- Steve Changes from v3.12.22-rt34: --- Ben Hutchings (1): Fix latency histogram after "hrtimer: Set expiry time before switch_hrtimer_base()" Sebastian Andrzej Siewior (2): Revert "migrate_disable pushd down in atomic_dec_and_spin_lock" timer: do not spin_trylock() on UP Steven Rostedt (Red Hat) (1): Linux 3.12.22-rt35 ---- kernel/hrtimer.c | 10 +++++----- kernel/rtmutex.c | 6 +++--- kernel/timer.c | 13 +++++++++++++ localversion-rt | 2 +- 4 files changed, 22 insertions(+), 9 deletions(-) --------------------------- diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index bc0e47dc0a05..c967b718ab37 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1105,6 +1105,11 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, #endif } + hrtimer_set_expires_range_ns(timer, tim, delta_ns); + + /* Switch the timer base, if necessary: */ + new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); + #ifdef CONFIG_MISSED_TIMER_OFFSETS_HIST { ktime_t now = new_base->get_time(); @@ -1116,11 +1121,6 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, } #endif - hrtimer_set_expires_range_ns(timer, tim, delta_ns); - - /* Switch the timer base, if necessary: */ - new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); - timer_stats_hrtimer_set_start_info(timer); leftmost = enqueue_hrtimer(timer, new_base); diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c index 4057bc607923..d1b2ca08b160 100644 --- a/kernel/rtmutex.c +++ b/kernel/rtmutex.c @@ -952,12 +952,12 @@ int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock) /* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */ if (atomic_add_unless(atomic, -1, 1)) return 0; + migrate_disable(); rt_spin_lock(lock); - if (atomic_dec_and_test(atomic)){ - migrate_disable(); + if (atomic_dec_and_test(atomic)) return 1; - } rt_spin_unlock(lock); + migrate_enable(); return 0; } EXPORT_SYMBOL(atomic_dec_and_spin_lock); diff --git a/kernel/timer.c b/kernel/timer.c index 611a5973d9e1..3b79da2f9c67 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1461,6 +1461,19 @@ void run_local_timers(void) * the timer softirq. */ #ifdef CONFIG_PREEMPT_RT_FULL + +#ifndef CONFIG_SMP + /* + * The spin_do_trylock() later may fail as the lock may be hold before + * the interrupt arrived. The spin-lock debugging code will raise a + * warning if the try_lock fails on UP. Since this is only an + * optimization for the FULL_NO_HZ case (not to run the timer softirq on + * an nohz_full CPU) we don't really care and shedule the softirq. + */ + raise_softirq(TIMER_SOFTIRQ); + return; +#endif + /* On RT, irq work runs from softirq */ if (irq_work_needs_cpu()) { raise_softirq(TIMER_SOFTIRQ); diff --git a/localversion-rt b/localversion-rt index 21988f9ad53f..366440d74b77 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt34 +-rt35 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
