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...+++++++++++++++++++++++++++++ arch/x86/include/asm/spinlock.h | 5 ++++ arch/x86/include/asm/spinlock_types.h | 4 +++ 4 files changed, 51 insertions(+), 0 deletions(-) create mode 100644 arch/x86/include/asm/qspinlock.h diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1b4ff87..5bf70ab 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -17,6 +17,7 @@ config X86_64 depends on 64BIT select X86_DEV_DMA_OPS select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_USE_QUEUE_SPINLOCK ### Arch settings config X86 diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/q...

...+++++++++++++++++++++++++++++ arch/x86/include/asm/spinlock.h | 5 ++++ arch/x86/include/asm/spinlock_types.h | 4 +++ 4 files changed, 51 insertions(+), 0 deletions(-) create mode 100644 arch/x86/include/asm/qspinlock.h diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1b4ff87..5bf70ab 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -17,6 +17,7 @@ config X86_64 depends on 64BIT select X86_DEV_DMA_OPS select ARCH_USE_CMPXCHG_LOCKREF + select ARCH_USE_QUEUE_SPINLOCK ### Arch settings config X86 diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/q...

...| 11 +++++ arch/x86/include/asm/qspinlock.h | 74 ++++++++++++++++++++++++++++++++++ arch/x86/kernel/Makefile | 1 + arch/x86/kernel/paravirt-spinlocks.c | 7 +++ 4 files changed, 93 insertions(+), 0 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5bf70ab..8d7c941 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -645,6 +645,17 @@ config PARAVIRT_SPINLOCKS If you are unsure how to answer this question, answer Y. +config PARAVIRT_UNFAIR_LOCKS + bool "Enable unfair locks in a para-virtualized guest" + depends on PARAVIRT &&...

...lude/asm/qspinlock.h | 74 ++++++++++++++++++++++++++++++++++ > arch/x86/kernel/Makefile | 1 + > arch/x86/kernel/paravirt-spinlocks.c | 7 +++ > 4 files changed, 93 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 5bf70ab..8d7c941 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -645,6 +645,17 @@ config PARAVIRT_SPINLOCKS > > If you are unsure how to answer this question, answer Y. > > +config PARAVIRT_UNFAIR_LOCKS > + bool "Enable unfair locks in a para-virtualized...

...lude/asm/qspinlock.h | 74 ++++++++++++++++++++++++++++++++++ > arch/x86/kernel/Makefile | 1 + > arch/x86/kernel/paravirt-spinlocks.c | 7 +++ > 4 files changed, 93 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 5bf70ab..8d7c941 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -645,6 +645,17 @@ config PARAVIRT_SPINLOCKS > > If you are unsure how to answer this question, answer Y. > > +config PARAVIRT_UNFAIR_LOCKS > + bool "Enable unfair locks in a para-virtualized...

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue

v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue