Displaying 20 results from an estimated 85 matches for "arch_spin_is_contend".
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arch_spin_is_contended
2015 Feb 15
0
[PATCH V5] x86 spinlock: Fix memory corruption on completing completions
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +161,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2015 Feb 15
0
[PATCH V5] x86 spinlock: Fix memory corruption on completing completions
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +161,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2014 Jun 28
2
[RFC PATCH v2] Implement Batched (group) ticket lock
...slowpath(lock, prev);
} else
- __add(&lock->tickets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
+ __add(&lock->tickets.head, TICKET_LOCK_UNLOCK_INC,
+ UNLOCK_LOCK_PREFIX);
}
static inline int arch_spin_is_locked(arch_spinlock_t *lock)
@@ -171,7 +218,7 @@ static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = ACCESS_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_UNLOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_contended
diff --git a...
2015 Feb 15
7
[PATCH V5] x86 spinlock: Fix memory corruption on completing completions
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +162,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2014 Jun 28
2
[RFC PATCH v2] Implement Batched (group) ticket lock
...slowpath(lock, prev);
} else
- __add(&lock->tickets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
+ __add(&lock->tickets.head, TICKET_LOCK_UNLOCK_INC,
+ UNLOCK_LOCK_PREFIX);
}
static inline int arch_spin_is_locked(arch_spinlock_t *lock)
@@ -171,7 +218,7 @@ static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = ACCESS_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_UNLOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_contended
diff --git a...
2015 Feb 15
7
[PATCH V5] x86 spinlock: Fix memory corruption on completing completions
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +162,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2010 Nov 16
23
[PATCH 00/14] PV ticket locks without expanding spinlock
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
2010 Nov 16
23
[PATCH 00/14] PV ticket locks without expanding spinlock
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
2010 Nov 16
23
[PATCH 00/14] PV ticket locks without expanding spinlock
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
2012 Mar 21
15
[PATCH RFC V6 0/11] Paravirtualized ticketlocks
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
2012 Mar 21
15
[PATCH RFC V6 0/11] Paravirtualized ticketlocks
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
2015 Feb 13
3
[PATCH V4] x86 spinlock: Fix memory corruption on completing completions
...ICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,7 +161,7 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return tmp.tail != (tmp.head & ~TICKET_SLOWPATH_FLAG);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
@@ -183,16 +180,16 @@ static __always_inline void arch_spin_lock_flags(arch_spinlock_t *lock,
static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
{
- __ticket_t head = ACCESS_ONCE(lock->tickets.head);
+ __ticket_t head = READ_ONCE(lock->tickets.head);...
2015 Feb 13
3
[PATCH V4] x86 spinlock: Fix memory corruption on completing completions
...ICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,7 +161,7 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return tmp.tail != (tmp.head & ~TICKET_SLOWPATH_FLAG);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
@@ -183,16 +180,16 @@ static __always_inline void arch_spin_lock_flags(arch_spinlock_t *lock,
static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
{
- __ticket_t head = ACCESS_ONCE(lock->tickets.head);
+ __ticket_t head = READ_ONCE(lock->tickets.head);...
2012 Apr 19
13
[PATCH RFC V7 0/12] Paravirtualized ticketlocks
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
2012 Apr 19
13
[PATCH RFC V7 0/12] Paravirtualized ticketlocks
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
2015 Feb 24
2
[PATCH for stable] x86/spinlocks/paravirt: Fix memory corruption on unlock
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +161,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2015 Feb 24
2
[PATCH for stable] x86/spinlocks/paravirt: Fix memory corruption on unlock
...kets.head, TICKET_LOCK_INC, UNLOCK_LOCK_PREFIX);
}
@@ -164,14 +161,15 @@ static inline int arch_spin_is_locked(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return tmp.tail != tmp.head;
+ return !__tickets_equal(tmp.tail, tmp.head);
}
static inline int arch_spin_is_contended(arch_spinlock_t *lock)
{
struct __raw_tickets tmp = READ_ONCE(lock->tickets);
- return (__ticket_t)(tmp.tail - tmp.head) > TICKET_LOCK_INC;
+ tmp.head &= ~TICKET_SLOWPATH_FLAG;
+ return (tmp.tail - tmp.head) > TICKET_LOCK_INC;
}
#define arch_spin_is_contended arch_spin_is_cont...
2013 Aug 06
16
[PATCH V12 0/14] Paravirtualized ticket spinlocks
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
2013 Aug 06
16
[PATCH V12 0/14] Paravirtualized ticket spinlocks
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
2013 Aug 06
16
[PATCH V12 0/14] Paravirtualized ticket spinlocks
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