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Date: Wed, 3 Oct 2012 19:47:40 +0530 From: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com> To: Avi Kivity <avi@...hat.com> Cc: Gleb Natapov <gleb@...hat.com>, Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>, Jiannan Ouyang <ouyang@...pitt.edu>, Peter Zijlstra <peterz@...radead.org>, Rik van Riel <riel@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>, Srikar <srikar@...ux.vnet.ibm.com>, "Nikunj A. Dadhania" <nikunj@...ux.vnet.ibm.com>, KVM <kvm@...r.kernel.org>, chegu vinod <chegu_vinod@...com>, "Andrew M. Theurer" <habanero@...ux.vnet.ibm.com>, LKML <linux-kernel@...r.kernel.org>, Srivatsa Vaddagiri <srivatsa.vaddagiri@...il.com> Subject: Re: [PATCH RFC 1/2] kvm: Handle undercommitted guest case in PLE handler * Avi Kivity <avi@...hat.com> [2012-09-30 13:13:09]: > On 09/30/2012 01:07 PM, Gleb Natapov wrote: > > On Sun, Sep 30, 2012 at 10:18:17AM +0200, Avi Kivity wrote: > >> On 09/28/2012 08:16 AM, Raghavendra K T wrote: > >> > > >> >> > >> >> +struct pv_sched_info { > >> >> + unsigned long sched_bitmap; > >> > > >> > Thinking, whether we need something similar to cpumask here? > >> > Only thing is we are representing guest (v)cpumask. > >> > > >> > >> DECLARE_BITMAP(sched_bitmap, KVM_MAX_VCPUS) > >> > > vcpu_id can be greater than KVM_MAX_VCPUS. > > Use the index into the vcpu table as the bitmap index then. In fact > it's better because then the lookup to get the vcpu pointer is trivial. Did you mean, while setting the bitmap, we should do for (i = 1..n) if (kvm->vcpus[i] == vcpu) set ith position in bitmap? I just wanted to know whether there is any easy way to convert from vcpu pointer to index in kvm vcpu table. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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