[PATCH v3 0/4] implement vcpu preempted check

[Pan Xinhui]

在 2016/9/29 18:31, Peter Zijlstra 写道:
> On Thu, Sep 29, 2016 at 12:23:19PM +0200, Christian Borntraeger wrote:
>> On 09/29/2016 12:10 PM, Peter Zijlstra wrote:
>>> On Thu, Jul 21, 2016 at 07:45:10AM -0400, Pan Xinhui wrote:
>>>> change from v2:
>>>> 	no code change, fix typos, update some comments
>>>>
>>>> change from v1:
>>>> 	a simplier definition of default vcpu_is_preempted
>>>> 	skip mahcine type check on ppc, and add config. remove dedicated macro.
>>>> 	add one patch to drop overload of rwsem_spin_on_owner and mutex_spin_on_owner.
>>>> 	add more comments
>>>> 	thanks boqun and Peter's suggestion.
>>>>
>>>> This patch set aims to fix lock holder preemption issues.
>>>
>>> So I really like the concept, but I would also really like to see
>>> support for more hypervisors included before we can move forward with
>>> this.
>>>
>>> Please consider s390 and (x86/arm) KVM. Once we have a few, more can
>>> follow later, but I think its important to not only have PPC support for
>>> this.
>>
>> Actually the s390 preemted check via sigp sense running  is available for
>> all hypervisors (z/VM, LPAR and KVM) which implies everywhere as you can no
>> longer buy s390 systems without LPAR.
>>
>> As Heiko already pointed out we could simply use a small inline function
>> that calls cpu_is_preempted from arch/s390/lib/spinlock (or smp_vcpu_scheduled from smp.c)
>
> Sure, and I had vague memories of Heiko's email. This patch set however
> completely fails to do that trivial hooking up.
>

sorry for that.
I will try to work it out on x86.

Hi, Will
	I appreciate that if you or some other arm guys could help on it. :)