Messages in this thread | | | Date | Tue, 28 Jun 2016 11:14:56 +0800 | From | xinhui <> | Subject | Re: [PATCH 1/3] kernel/sched: introduce vcpu preempted check interface |
| |
On 2016年06月27日 22:02, Peter Zijlstra wrote: > 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... >> fair enough.
>> Also, please Cc the virt list so that other interested parties can >> comment, and maybe also the s390 folks. > oh. I forgot that. maybe we need cc more.
root@ltcalpine2-lp13:~/linux# find ./arch -name kvm ./arch/arm/kvm ./arch/arm64/kvm ./arch/mips/kvm ./arch/powerpc/kvm ./arch/s390/kvm ./arch/tile/kvm ./arch/x86/kvm
> And before you hurry off to post again, add a patch doing > mutex_spin_on_owner() and rwsem_spin_in_owner(). > will do that.
thanks for your suggestion. :)
| |