linux-kernel - Re: [PATCH v1 03/11] KVM: x86: dynamic kvm_apic

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Message-ID: <20160701153503.GF27840@potion>
Date:	Fri, 1 Jul 2016 17:35:07 +0200
From:	Radim Krčmář <rkrcmar@...hat.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Andrew Honig <ahonig@...gle.com>, linux-kernel@...r.kernel.org,
	kvm <kvm@...r.kernel.org>, "Lan, Tianyu" <tianyu.lan@...el.com>,
	Igor Mammedov <imammedo@...hat.com>,
	Jan Kiszka <jan.kiszka@....de>, Peter Xu <peterx@...hat.com>
Subject: Re: [PATCH v1 03/11] KVM: x86: dynamic kvm_apic_map

2016-07-01 17:06+0200, Paolo Bonzini:
> On 01/07/2016 16:38, Radim Krčmář wrote:
>                                                                   On the
> other hand, I suspect you need to bump KVM_MAX_VCPU_ID beyond its
> current default setting (which is equal to KVM_MAX_VCPUS), up to 511 or
> 1023.

Yes, thanks for pointing it out.  APIC ID 1023 is reasonably low and I'm
pretty sure that it cannot be surpassed with any topology of 288 VCPUs.
(The limit should be 543, with 257 cores per package.)