Messages in this thread | | | Date | Tue, 28 Jun 2016 09:00:13 +0200 | From | Heiko Carstens <> | Subject | Re: [PATCH 1/3] kernel/sched: introduce vcpu preempted check interface |
| |
On Mon, Jun 27, 2016 at 04:00:43PM +0200, Peter Zijlstra wrote: > On Mon, Jun 27, 2016 at 01:41:28PM -0400, Pan Xinhui wrote: > > +++ b/include/linux/sched.h > > @@ -3293,6 +3293,15 @@ static inline void set_task_cpu(struct task_struct *p, unsigned int cpu) > > > > #endif /* CONFIG_SMP */ > > > > +#ifdef arch_vcpu_is_preempted > > +static inline bool vcpu_is_preempted(int cpu) > > +{ > > + return arch_vcpu_is_preempted(cpu); > > +} > > +#else > > +#define vcpu_is_preempted(cpu) false > > +#endif > > #ifndef vcpu_is_preempted > #define vcpu_is_preempted(cpu) (false) > #endif > > Is so much simpler... > > Also, please Cc the virt list so that other interested parties can > comment, and maybe also the s390 folks.
The s390 implementation would be to simply use cpu_is_preempted() from arch/s390/lib/spinlock.c. It's nice that there will be a common code function for this!
| |