linux-kernel - Re: [PATCH 1/3] arm: kvm: clamp NR_VCPUS to MAX

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Message-Id: <AC39CB35-1EE1-49DE-A2E4-F544699A516B@suse.de>
Date:	Sat, 14 Sep 2013 07:14:02 -0500
From:	Alexander Graf <agraf@...e.de>
To:	Andrew Jones <drjones@...hat.com>
Cc:	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"catalin.marinas@....com" <catalin.marinas@....com>,
	"will.deacon@....com" <will.deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"pbonzini@...hat.com" <pbonzini@...hat.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/3] arm: kvm: clamp NR_VCPUS to MAX_VCPUS



Am 14.09.2013 um 07:10 schrieb Andrew Jones <drjones@...hat.com>:

> Signed-off-by: Andrew Jones <drjones@...hat.com>
> ---
> arch/arm/kvm/arm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
> index 741f66a2edbd7..9ebf8ac3a12ff 100644
> --- a/arch/arm/kvm/arm.c
> +++ b/arch/arm/kvm/arm.c
> @@ -201,7 +201,7 @@ int kvm_dev_ioctl_check_extension(long ext)
>        r = 1;
>        break;
>    case KVM_CAP_NR_VCPUS:
> -        r = num_online_cpus();
> +        r = min(num_online_cpus(), KVM_MAX_VCPUS);

Is there any real reason to prohibit overcommit?

Alex

>        break;
>    case KVM_CAP_MAX_VCPUS:
>        r = KVM_MAX_VCPUS;
> -- 
> 1.8.1.4
> 
> _______________________________________________
> kvmarm mailing list
> kvmarm@...ts.cs.columbia.edu
> https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm
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