Dear RT folks!
I'm pleased to announce the v5.4.24-rt15 patch set.
Changes since v5.4.24-rt14:
- A warning in kmalloc() has been added. On RT with
CONFIG_DEBUG_ATOMIC_SLEEP enabled it triggers on memory allocations
in atomic context.
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 v5.4.24-rt14 is appended below and can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.4/incr/patch-5.4.24-rt14-rt15.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 v5.4.24-rt15
The RT patch against v5.4.24 can be found here:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.4/older/patch-5.4.24-rt15.patch.xz
The split quilt queue is available at:
https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.4/older/patches-5.4.24-rt15.tar.xz
Sebastian
diff --git a/localversion-rt b/localversion-rt
index 08b3e75841adc..18777ec0c27d4 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt14
+-rt15
diff --git a/mm/slub.c b/mm/slub.c
index 2cff48d13e3a7..7b2773c45e1ff 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2742,6 +2742,9 @@ static __always_inline void *slab_alloc_node(struct kmem_cache *s,
struct page *page;
unsigned long tid;
+ if (IS_ENABLED(CONFIG_PREEMPT_RT) && IS_ENABLED(CONFIG_DEBUG_ATOMIC_SLEEP))
+ WARN_ON_ONCE(!preemptible() && system_state >= SYSTEM_SCHEDULING);
+
s = slab_pre_alloc_hook(s, gfpflags);
if (!s)
return NULL;
@@ -3202,6 +3205,9 @@ int kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
LIST_HEAD(to_free);
int i;
+ if (IS_ENABLED(CONFIG_PREEMPT_RT) && IS_ENABLED(CONFIG_DEBUG_ATOMIC_SLEEP))
+ WARN_ON_ONCE(!preemptible() && system_state >= SYSTEM_SCHEDULING);
+
/* memcg and kmem_cache debug support */
s = slab_pre_alloc_hook(s, flags);
if (unlikely(!s))
