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Message-ID: <20150810103531.6bc57ff0@gandalf.local.home>
Date: Mon, 10 Aug 2015 10:35:31 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Carsten Emde <C.Emde@...dl.org>,
John Kacur <jkacur@...hat.com>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [ANNOUNCE] 3.12.44-rt62
Dear RT Folks,
I'm pleased to announce the 3.12.44-rt62 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: 5c430e983d975e4737aaed0f70ecb2c384f4c786
Or to build 3.12.44-rt62 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-3.12.44.xz
http://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patch-3.12.44-rt62.patch.xz
You can also build from 3.12.44-rt61 by applying the incremental patch:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.12/incr/patch-3.12.44-rt61-rt62.patch.xz
Enjoy,
-- Steve
Changes from v3.12.44-rt61:
---
Bogdan Purcareata (1):
powerpc/kvm: Disable in-kernel MPIC emulation for PREEMPT_RT_FULL
Frederic Weisbecker (1):
x86-Tell-irq-work-about-self-IPI-support-3.14
Sebastian Andrzej Siewior (1):
Revert "slub: delay ctor until the object is requested"
Steven Rostedt (1):
xfs: Disable percpu SB on PREEMPT_RT_FULL
Steven Rostedt (Red Hat) (1):
Linux 3.12.44-rt62
Thomas Gleixner (1):
mm/slub: move slab initialization into irq enabled region
----
arch/powerpc/kvm/Kconfig | 1 +
arch/x86/include/asm/Kbuild | 1 -
arch/x86/include/asm/irq_work.h | 11 ++++++
arch/x86/kernel/irq_work.c | 2 +-
fs/xfs/xfs_linux.h | 2 +-
localversion-rt | 2 +-
mm/slub.c | 86 +++++++++++++++++++----------------------
7 files changed, 54 insertions(+), 51 deletions(-)
---------------------------
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index ffaef2cb101a..78c3c30de9fd 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -155,6 +155,7 @@ config KVM_E500MC
config KVM_MPIC
bool "KVM in-kernel MPIC emulation"
depends on KVM && E500
+ depends on !PREEMPT_RT_FULL
select HAVE_KVM_IRQCHIP
select HAVE_KVM_IRQ_ROUTING
select HAVE_KVM_MSI
diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index 1eb77ac0613c..7f669853317a 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -5,4 +5,3 @@ genhdr-y += unistd_64.h
genhdr-y += unistd_x32.h
generic-y += clkdev.h
-generic-y += irq_work.h
diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h
new file mode 100644
index 000000000000..78162f8e248b
--- /dev/null
+++ b/arch/x86/include/asm/irq_work.h
@@ -0,0 +1,11 @@
+#ifndef _ASM_IRQ_WORK_H
+#define _ASM_IRQ_WORK_H
+
+#include <asm/processor.h>
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+ return cpu_has_apic;
+}
+
+#endif /* _ASM_IRQ_WORK_H */
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index 1de84e3ab4e0..15d741ddfeeb 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -41,7 +41,7 @@ __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs)
void arch_irq_work_raise(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
- if (!cpu_has_apic)
+ if (!arch_irq_work_has_interrupt())
return;
apic->send_IPI_self(IRQ_WORK_VECTOR);
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index f9bb590acc0e..8483f8cf432a 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -131,7 +131,7 @@ typedef __uint64_t __psunsigned_t;
/*
* Feature macros (disable/enable)
*/
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_PREEMPT_RT_FULL)
#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
#else
#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
diff --git a/localversion-rt b/localversion-rt
index 9b7de9345ef4..40d81d8e61b6 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt61
+-rt62
diff --git a/mm/slub.c b/mm/slub.c
index 90154580b304..3a5d54e75ffe 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1276,6 +1276,14 @@ struct slub_free_list {
};
static DEFINE_PER_CPU(struct slub_free_list, slub_free_list);
+static void setup_object(struct kmem_cache *s, struct page *page,
+ void *object)
+{
+ setup_object_debug(s, page, object);
+ if (unlikely(s->ctor))
+ s->ctor(object);
+}
+
/*
* Slab allocation and freeing
*/
@@ -1298,6 +1306,8 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
struct kmem_cache_order_objects oo = s->oo;
gfp_t alloc_gfp;
bool enableirqs;
+ void *start, *last, *p;
+ int idx, order;
flags &= gfp_allowed_mask;
@@ -1324,13 +1334,13 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
* Try a lower order alloc if possible
*/
page = alloc_slab_page(flags, node, oo);
-
- if (page)
- stat(s, ORDER_FALLBACK);
+ if (unlikely(!page))
+ goto out;
+ stat(s, ORDER_FALLBACK);
}
- if (kmemcheck_enabled && page
- && !(s->flags & (SLAB_NOTRACK | DEBUG_DEFAULT_FLAGS))) {
+ if (kmemcheck_enabled &&
+ !(s->flags & (SLAB_NOTRACK | DEBUG_DEFAULT_FLAGS))) {
int pages = 1 << oo_order(oo);
kmemcheck_alloc_shadow(page, oo_order(oo), flags, node);
@@ -1345,47 +1355,9 @@ static struct page *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
kmemcheck_mark_unallocated_pages(page, pages);
}
- if (enableirqs)
- local_irq_disable();
- if (!page)
- return NULL;
-
page->objects = oo_objects(oo);
- mod_zone_page_state(page_zone(page),
- (s->flags & SLAB_RECLAIM_ACCOUNT) ?
- NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
- 1 << oo_order(oo));
-
- return page;
-}
-
-static void setup_object(struct kmem_cache *s, struct page *page,
- void *object)
-{
- setup_object_debug(s, page, object);
-#ifndef CONFIG_PREEMPT_RT_FULL
- if (unlikely(s->ctor))
- s->ctor(object);
-#endif
-}
-
-static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
-{
- struct page *page;
- void *start;
- void *last;
- void *p;
- int order;
-
- BUG_ON(flags & GFP_SLAB_BUG_MASK);
-
- page = allocate_slab(s,
- flags & (GFP_RECLAIM_MASK | GFP_CONSTRAINT_MASK), node);
- if (!page)
- goto out;
order = compound_order(page);
- inc_slabs_node(s, page_to_nid(page), page->objects);
memcg_bind_pages(s, order);
page->slab_cache = s;
__SetPageSlab(page);
@@ -1409,10 +1381,34 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
page->freelist = start;
page->inuse = page->objects;
page->frozen = 1;
+
out:
+ if (enableirqs)
+ local_irq_disable();
+ if (!page)
+ return NULL;
+
+ mod_zone_page_state(page_zone(page),
+ (s->flags & SLAB_RECLAIM_ACCOUNT) ?
+ NR_SLAB_RECLAIMABLE : NR_SLAB_UNRECLAIMABLE,
+ 1 << oo_order(oo));
+
+ inc_slabs_node(s, page_to_nid(page), page->objects);
+
return page;
}
+static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
+{
+ if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
+ pr_emerg("gfp: %u\n", flags & GFP_SLAB_BUG_MASK);
+ BUG();
+ }
+
+ return allocate_slab(s,
+ flags & (GFP_RECLAIM_MASK | GFP_CONSTRAINT_MASK), node);
+}
+
static void __free_slab(struct kmem_cache *s, struct page *page)
{
int order = compound_order(page);
@@ -2470,10 +2466,6 @@ redo:
if (unlikely(gfpflags & __GFP_ZERO) && object)
memset(object, 0, s->object_size);
-#ifdef CONFIG_PREEMPT_RT_FULL
- if (unlikely(s->ctor) && object)
- s->ctor(object);
-#endif
slab_post_alloc_hook(s, gfpflags, object);
--
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