search for: 9e7659e

Displaying 6 results from an estimated 6 matches for "9e7659e".

[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
2014 May 08
1
[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
On Wed, May 07, 2014 at 11:01:38AM -0400, Waiman Long wrote: No, we want the unfair thing for VIRT, not PARAVIRT. > diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c > index 9e7659e..10e87e1 100644 > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspinlock.c > @@ -227,6 +227,14 @@ static __always_inline int get_qlock(struct qspinlock *lock) > { > struct __qspinlock *l = (void *)lock; > > +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS > + if (static_...
[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
2014 May 08
1
[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
On Wed, May 07, 2014 at 11:01:38AM -0400, Waiman Long wrote: No, we want the unfair thing for VIRT, not PARAVIRT. > diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c > index 9e7659e..10e87e1 100644 > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspinlock.c > @@ -227,6 +227,14 @@ static __always_inline int get_qlock(struct qspinlock *lock) > { > struct __qspinlock *l = (void *)lock; > > +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS > + if (static_...
[PATCH v10 09/19] qspinlock: Prepare for unfair lock support
2014 May 07
0
[PATCH v10 09/19] qspinlock: Prepare for unfair lock support
...defined as a shorthand for mcs.locked. Signed-off-by: Waiman Long <Waiman.Long at hp.com> --- kernel/locking/qspinlock.c | 26 +++++++++++++++++++------- 1 files changed, 19 insertions(+), 7 deletions(-) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index e98d7d4..9e7659e 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -64,6 +64,7 @@ struct qnode { struct mcs_spinlock mcs; }; +#define qhead mcs.locked /* The queue head flag */ /* * Per-CPU queue node structures; we can never have more than 4 nested @@ -216,18 +217,20 @@ xchg_tail...
[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
2014 May 07
0
[PATCH v10 10/19] qspinlock, x86: Allow unfair spinlock in a virtual guest
...X86_FEATURE_HYPERVISOR)) + return 0; + + static_key_slow_inc(&paravirt_unfairlocks_enabled); + printk(KERN_INFO "Unfair spinlock enabled\n"); + + return 0; +} +early_initcall(unfair_locks_init_jump); + +#endif diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index 9e7659e..10e87e1 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -227,6 +227,14 @@ static __always_inline int get_qlock(struct qspinlock *lock) { struct __qspinlock *l = (void *)lock; +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS + if (static_key_false(&paravirt_unfairlocks_enab...
[PATCH v10 00/19] qspinlock: a 4-byte queue spinlock with PV support
2014 May 07
32
[PATCH v10 00/19] qspinlock: a 4-byte queue spinlock with PV support
v9->v10: - Make some minor changes to qspinlock.c to accommodate review feedback. - Change author to PeterZ for 2 of the patches. - Include Raghavendra KT's test results in patch 18. v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex
[PATCH v10 00/19] qspinlock: a 4-byte queue spinlock with PV support
2014 May 07
32
[PATCH v10 00/19] qspinlock: a 4-byte queue spinlock with PV support
v9->v10: - Make some minor changes to qspinlock.c to accommodate review feedback. - Change author to PeterZ for 2 of the patches. - Include Raghavendra KT's test results in patch 18. v8->v9: - Integrate PeterZ's version of the queue spinlock patch with some modification: http://lkml.kernel.org/r/20140310154236.038181843 at infradead.org - Break the more complex