lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
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/

Powered by blists - more mailing lists