search for: __ticket_lock_inc

...b04c03d 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -3,15 +3,16 @@ #include <linux/types.h> +#define TICKET_LOCK_INC_SHIFT 1 +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) + #ifdef CONFIG_PARAVIRT_SPINLOCKS -#define __TICKET_LOCK_INC 2 #define TICKET_SLOWPATH_FLAG ((__ticket_t)1) #else -#define __TICKET_LOCK_INC 1 #define TICKET_SLOWPATH_FLAG ((__ticket_t)0) #endif -#if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_INC)) +#if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_TAIL_INC)) typedef u8 __ticket_t; typedef u16 __ticketpa...

...b04c03d 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -3,15 +3,16 @@ #include <linux/types.h> +#define TICKET_LOCK_INC_SHIFT 1 +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) + #ifdef CONFIG_PARAVIRT_SPINLOCKS -#define __TICKET_LOCK_INC 2 #define TICKET_SLOWPATH_FLAG ((__ticket_t)1) #else -#define __TICKET_LOCK_INC 1 #define TICKET_SLOWPATH_FLAG ((__ticket_t)0) #endif -#if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_INC)) +#if (CONFIG_NR_CPUS < (256 / __TICKET_LOCK_TAIL_INC)) typedef u8 __ticket_t; typedef u16 __ticketpa...

...ock_types.h > +++ b/arch/x86/include/asm/spinlock_types.h > @@ -3,15 +3,16 @@ > > #include<linux/types.h> > > +#define TICKET_LOCK_INC_SHIFT 1 > +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) > + > #ifdef CONFIG_PARAVIRT_SPINLOCKS > -#define __TICKET_LOCK_INC 2 > #define TICKET_SLOWPATH_FLAG ((__ticket_t)1) > #else > -#define __TICKET_LOCK_INC 1 > #define TICKET_SLOWPATH_FLAG ((__ticket_t)0) > #endif > > -#if (CONFIG_NR_CPUS< (256 / __TICKET_LOCK_INC)) > +#if (CONFIG_NR_CPUS< (256 / __TICKET_LOCK_TAIL_INC)) >...

..._types.h > +++ b/arch/x86/include/asm/spinlock_types.h > @@ -3,15 +3,16 @@ > > #include <linux/types.h> > > +#define TICKET_LOCK_INC_SHIFT 1 > +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) > + > #ifdef CONFIG_PARAVIRT_SPINLOCKS > -#define __TICKET_LOCK_INC 2 > #define TICKET_SLOWPATH_FLAG ((__ticket_t)1) > #else > -#define __TICKET_LOCK_INC 1 > #define TICKET_SLOWPATH_FLAG ((__ticket_t)0) > #endif For the !CONFIG_PARAVIRT case, TICKET_LOCK_INC_SHIFT used to be 0, now you are making it one. Probably not an issue, since even people...

...s, irq_enable, "sti"); @@ -12,6 +14,14 @@ DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax"); DEF_NATIVE(pv_cpu_ops, clts, "clts"); DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc"); +DEF_NATIVE(, unlock1, UNLOCK_LOCK_PREFIX + "addb $"__stringify(__TICKET_LOCK_INC)", (%eax)"); +DEF_NATIVE(, unlock2, UNLOCK_LOCK_PREFIX + "addw $"__stringify(__TICKET_LOCK_INC)", (%eax)"); + +extern void __unlock_wrong_size(void) + __compiletime_error("Bad argument size for unlock"); + unsigned paravirt_patch_ident_32(void *insnbu...

.../spinlock_types.h b/arch/x86/include/asm/spinlock_types.h index 5f9d757..579409a 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -4,8 +4,9 @@ #include <linux/types.h> #ifdef CONFIG_PARAVIRT_SPINLOCKS +#define TICKET_SLOWPATH_BIT 0 #define __TICKET_LOCK_INC 2 -#define TICKET_SLOWPATH_FLAG ((__ticket_t)1) +#define TICKET_SLOWPATH_FLAG ((__ticket_t)(1 << TICKET_SLOWPATH_BIT)) #else #define __TICKET_LOCK_INC 1 #define TICKET_SLOWPATH_FLAG ((__ticket_t)0) -- 2.1.4

...it a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h index 73c4c00..339ddf8 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -3,15 +3,16 @@ #include <linux/types.h> + #ifdef CONFIG_PARAVIRT_SPINLOCKS -#define __TICKET_LOCK_INC 2 -#define TICKET_SLOWPATH_FLAG ((__ticket_t)1) +#define TICKET_LOCK_INC_SHIFT 1 +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) #else -#define __TICKET_LOCK_INC 1 -#define TICKET_SLOWPATH_FLAG ((__ticket_t)0) +#define TICKET_LOCK_INC_SHIFT 0 +#define __TICKET_LOCK_TAIL_INC (1...

...it a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h index 73c4c00..339ddf8 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -3,15 +3,16 @@ #include <linux/types.h> + #ifdef CONFIG_PARAVIRT_SPINLOCKS -#define __TICKET_LOCK_INC 2 -#define TICKET_SLOWPATH_FLAG ((__ticket_t)1) +#define TICKET_LOCK_INC_SHIFT 1 +#define __TICKET_LOCK_TAIL_INC (1<<TICKET_LOCK_INC_SHIFT) #else -#define __TICKET_LOCK_INC 1 -#define TICKET_SLOWPATH_FLAG ((__ticket_t)0) +#define TICKET_LOCK_INC_SHIFT 0 +#define __TICKET_LOCK_TAIL_INC (1...

Paravirtualized spinlocks produce some overhead even if the kernel is running on bare metal. The main reason are the more complex locking and unlocking functions. Especially unlocking is no longer just one instruction but so complex that it is no longer inlined. This patch series addresses this issue by adding two more pvops functions to reduce the size of the inlined spinlock functions. When

Paravirtualized spinlocks produce some overhead even if the kernel is running on bare metal. The main reason are the more complex locking and unlocking functions. Especially unlocking is no longer just one instruction but so complex that it is no longer inlined. This patch series addresses this issue by adding two more pvops functions to reduce the size of the inlined spinlock functions. When

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Hi all, This is a revised version of the pvticket lock series. The early part of the series is mostly unchanged: it converts the bulk of the ticket lock code into C and makes the "small" and "large" ticket code common. The only changes are the incorporation of various review comments. The latter part of

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Hi all, This is a revised version of the pvticket lock series. The early part of the series is mostly unchanged: it converts the bulk of the ticket lock code into C and makes the "small" and "large" ticket code common. The only changes are the incorporation of various review comments. The latter part of

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Hi all, This is a revised version of the pvticket lock series. The early part of the series is mostly unchanged: it converts the bulk of the ticket lock code into C and makes the "small" and "large" ticket code common. The only changes are the incorporation of various review comments. The latter part of

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Changes since last posting: (Raghavendra K T) [ - Rebased to linux-3.3-rc6. - used function+enum in place of macro (better type checking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] ] This series replaces the existing paravirtualized spinlock mechanism with a

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> Changes since last posting: (Raghavendra K T) [ - Rebased to linux-3.3-rc6. - used function+enum in place of macro (better type checking) - use cmpxchg while resetting zero status for possible race [suggested by Dave Hansen for KVM patches ] ] This series replaces the existing paravirtualized spinlock mechanism with a

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. (targeted for 3.5 window) Changes in V7: - Reabsed patches to 3.4-rc3 - Added jumplabel split patch (originally from Andrew Jones rebased to 3.4-rc3 - jumplabel changes from Ingo and Jason taken and now using

From: Jeremy Fitzhardinge <jeremy.fitzhardinge at citrix.com> This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. (targeted for 3.5 window) Changes in V7: - Reabsed patches to 3.4-rc3 - Added jumplabel split patch (originally from Andrew Jones rebased to 3.4-rc3 - jumplabel changes from Ingo and Jason taken and now using

This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. The series provides implementation for both Xen and KVM. The current set of patches are for Xen/x86 spinlock/KVM guest side, to be included against -tip. I 'll be sending a separate patchset for KVM host based on kvm tree. Please note I have added the below performance result

This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. The series provides implementation for both Xen and KVM. The current set of patches are for Xen/x86 spinlock/KVM guest side, to be included against -tip. I 'll be sending a separate patchset for KVM host based on kvm tree. Please note I have added the below performance result

This series replaces the existing paravirtualized spinlock mechanism with a paravirtualized ticketlock mechanism. The series provides implementation for both Xen and KVM. The current set of patches are for Xen/x86 spinlock/KVM guest side, to be included against -tip. I 'll be sending a separate patchset for KVM host based on kvm tree. Please note I have added the below performance result