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

From: Paolo Bonzini
Date: Thu Jun 18 2015 - 07:50:48 EST

On 18/06/2015 13:41, Michael S. Tsirkin wrote:
> On Thu, Jun 18, 2015 at 01:39:12PM +0200, Igor Mammedov wrote:
>> Lets leave decision upto users instead of making them live with
>> crashing guests.
> Come on, let's fix it in userspace.

It's not trivial to fix it in userspace. Since QEMU uses RCU there
isn't a single memory map to use for a linear gpa->hva map.

I find it absurd that we're fighting over 12K of memory.

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