Hello RT Folks! I'm pleased to announce the 4.19.127-rt55 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: v4.19-rt Head SHA1: f297d3d16170bd3af56f7310963c727ce2cab5c7 Or to build 4.19.127-rt55 directly, the following patches should be applied: https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.19.tar.xz https://www.kernel.org/pub/linux/kernel/v4.x/patch-4.19.127.xz https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/patch-4.19.127-rt55.patch.xz You can also build from 4.19.127-rt54 by applying the incremental patch: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/incr/patch-4.19.127-rt54-rt55.patch.xz Enjoy! Tom Changes from v4.19.127-rt54: --- Kevin Hao (1): mm: slub: Always flush the delayed empty slubs in flush_all() Sebastian Andrzej Siewior (1): fs/dcache: Include swait.h header Tom Zanussi (2): tasklet: Fix UP case for tasklet CHAINED state Linux 4.19.127-rt55 --- fs/proc/base.c | 1 + kernel/softirq.c | 6 ++++++ localversion-rt | 2 +- mm/slub.c | 3 --- 4 files changed, 8 insertions(+), 4 deletions(-) --- diff --git a/fs/proc/base.c b/fs/proc/base.c index a45d4d640f01..56b1c4f1e8c0 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -95,6 +95,7 @@ #include <linux/flex_array.h> #include <linux/posix-timers.h> #include <trace/events/oom.h> +#include <linux/swait.h> #include "internal.h" #include "fd.h" diff --git a/kernel/softirq.c b/kernel/softirq.c index 73dae64bfc9c..9bad7a16dc61 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -947,10 +947,12 @@ static void __tasklet_schedule_common(struct tasklet_struct *t, * is locked before adding it to the list. */ if (test_bit(TASKLET_STATE_SCHED, &t->state)) { +#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) if (test_and_set_bit(TASKLET_STATE_CHAINED, &t->state)) { tasklet_unlock(t); return; } +#endif t->next = NULL; *head->tail = t; head->tail = &(t->next); @@ -1044,7 +1046,11 @@ static void tasklet_action_common(struct softirq_action *a, again: t->func(t->data); +#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT_FULL) while (cmpxchg(&t->state, TASKLET_STATEF_RC, 0) != TASKLET_STATEF_RC) { +#else + while (!tasklet_tryunlock(t)) { +#endif /* * If it got disabled meanwhile, bail out: */ diff --git a/localversion-rt b/localversion-rt index 3165a8781ff5..51b05e9abe6f 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt54 +-rt55 diff --git a/mm/slub.c b/mm/slub.c index d243c6ef7fc9..a9473bbb1338 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2341,9 +2341,6 @@ static void flush_all(struct kmem_cache *s) for_each_online_cpu(cpu) { struct slub_free_list *f; - if (!has_cpu_slab(cpu, s)) - continue; - f = &per_cpu(slub_free_list, cpu); raw_spin_lock_irq(&f->lock); list_splice_init(&f->list, &tofree);
