From: Sasha Levin <levinsasha928@gmail.com>
To: Chegu Vinod <chegu_vinod@hp.com>
Cc: KVM <kvm@vger.kernel.org>
Subject: Re: KVM_MAX_VCPUS
Date: Sat, 13 Oct 2012 22:32:13 -0400 [thread overview]
Message-ID: <507A242D.9070708@gmail.com> (raw)
In-Reply-To: <5079EB5B.8080102@hp.com>
On 10/13/2012 06:29 PM, Chegu Vinod wrote:
> Hello,
>
> Wanted to get a clarification about KVM_MAX_VCPUS(currently set to 254)
> in kvm_host.h file. The kvm_vcpu *vcpus array is sized based on KVM_MAX_VCPUS.
> (i.e. a max of 254 elements in the array).
>
> An 8bit APIC id should allow for 256 ID's. Reserving one for Broadcast should
> leave 255 ID's. Is there one more ID reserved for some other purpose ? (hence
> leading to KVM_MAX_VCPUS being set to 254 and not 255).
Another ID goes to the IO-APIC.
Thanks,
Sasha
next prev parent reply other threads:[~2012-10-14 2:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-13 22:29 KVM_MAX_VCPUS Chegu Vinod
2012-10-14 2:32 ` Sasha Levin [this message]
2012-10-14 9:08 ` KVM_MAX_VCPUS Gleb Natapov
2012-10-14 13:42 ` KVM_MAX_VCPUS Chegu Vinod
2012-10-17 2:57 ` KVM_MAX_VCPUS Wei, Bing (WeiBing, MCXS-SH)
2012-10-17 7:21 ` KVM_MAX_VCPUS Gleb Natapov
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