Messages in this thread Patch in this message | | | Date | Thu, 16 Apr 2020 18:45:10 +0200 | From | Sebastian Andrzej Siewior <> | Subject | [ANNOUNCE] v5.6.4-rt3 |
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Dear RT folks!
I'm pleased to announce the v5.6.4-rt3 patch set.
Changes since v5.6.4-rt2:
- The printk thread could schedule where it is not appropriate. Affects only PREEMPT_VOLUNTARY. Reported by kernel test robot, patched by John Ogness.
- The initialization of nohz_full_kick_work triggered a warning. Reported by kbuild test robot.
- Patch by patch compilation could fail to compile in the fs/proc due to a missing header file. Reported by kbuild test robot.
- The cached signal struct could lead to a double free of another data structure. Reported by Daniel Wagner, patch by Matt Fleming.
Known issues - It has been pointed out that due to changes to the printk code the internal buffer representation changed. This is only an issue if tools like `crash' are used to extract the printk buffer from a kernel memory image.
The delta patch against v5.6.4-rt2 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/incr/patch-5.6.4-rt2-rt3.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 v5.6.4-rt3
The RT patch against v5.6.4 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/older/patch-5.6.4-rt3.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/older/patches-5.6.4-rt3.tar.xz
Sebastian
diff --git a/fs/proc/base.c b/fs/proc/base.c index 8c2a84fc4986d..eb8285ca344f3 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -96,6 +96,7 @@ #include <linux/posix-timers.h> #include <linux/time_namespace.h> #include <linux/resctrl.h> +#include <linux/swait.h> #include <trace/events/oom.h> #include "internal.h" #include "fd.h" diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index 8821a8c2263ff..8bc683be08574 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2715,6 +2715,7 @@ static int printk_kthread_func(void *data) &len, printk_time); console_lock(); + console_may_schedule = 0; call_console_drivers(master_seq, ext_text, ext_len, text, len, msg->level, msg->facility); if (len > 0 || ext_len > 0) diff --git a/kernel/signal.c b/kernel/signal.c index bfa9bcf27d3d7..75c82ecefdbb6 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -494,8 +494,8 @@ static void sigqueue_free_current(struct sigqueue *q) up = q->user; if (rt_prio(current->normal_prio) && !put_task_cache(current, q)) { - atomic_dec(&up->sigpending); - free_uid(up); + if (atomic_dec_and_test(&up->sigpending)) + free_uid(up); } else __sigqueue_free(q); } diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index b568947dc90e5..fc62dcbed7429 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -245,7 +245,7 @@ static void nohz_full_kick_func(struct irq_work *work) static DEFINE_PER_CPU(struct irq_work, nohz_full_kick_work) = { .func = nohz_full_kick_func, - .flags = IRQ_WORK_HARD_IRQ, + .flags = ATOMIC_INIT(IRQ_WORK_HARD_IRQ), }; /* diff --git a/localversion-rt b/localversion-rt index c3054d08a1129..1445cd65885cd 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt2 +-rt3
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