Dear RT Folks, I'm pleased to announce the 3.14.48-rt49 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: v3.14-rt Head SHA1: 30bcf7e47d9cbce6a4fa058b34f3490183579f20 Or to build 3.14.48-rt49 directly, the following patches should be applied: http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.14.tar.xz http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.14.48.xz http://www.kernel.org/pub/linux/kernel/projects/rt/3.14/patch-3.14.48-rt49.patch.xz You can also build from 3.14.48-rt48 by applying the incremental patch: http://www.kernel.org/pub/linux/kernel/projects/rt/3.14/incr/patch-3.14.48-rt48-rt49.patch.xz Enjoy, -- Steve Changes from v3.14.48-rt48: --- 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 3.14.48-rt49 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 141b2027189a..a0258b2b0f72 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -172,6 +172,7 @@ 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 24707986c321..4b7dca68a5b4 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt48 +-rt49 diff --git a/mm/slub.c b/mm/slub.c index 93eeaca6cb53..f21e9bcb9094 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1316,6 +1316,14 @@ 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 */ @@ -1338,6 +1346,8 @@ 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; @@ -1364,13 +1374,13 @@ 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); @@ -1385,47 +1395,9 @@ 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); @@ -1449,10 +1421,34 @@ 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); @@ -2519,10 +2515,6 @@ 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); -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
