Messages in this thread | | | Subject | Re: [PATCH v3 0/4] implement vcpu preempted check | From | Pan Xinhui <> | Date | Fri, 30 Sep 2016 13:03:34 +0800 |
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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. :)
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