linux-kernel - Re: [PATCH 3/5] vhost: support upto 509 memory regions

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Message-ID: <558135A2.5050808@redhat.com>
Date:	Wed, 17 Jun 2015 10:53:54 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>,
	Igor Mammedov <imammedo@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH 3/5] vhost: support upto 509 memory regions



On 17/06/2015 08:34, Michael S. Tsirkin wrote:
>>> > > 
>>> > > Also - 509?
>> > userspace memory slots in terms of KVM, I made it match
>> > KVM's allotment of memory slots for userspace side.
> Maybe KVM has its reasons for this #.

Nice power of two (512) - number of reserved slots required by Intel's
virtualization extensions (3: APIC access page, EPT identity page table,
VMX task state segment).

Paolo

 I don't see
> why we need to match this exactly.
> 
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