From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: IVSHMEM device performance
Date: Thu, 14 Apr 2016 14:45:19 +0200
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On 11/04/2016 08:21, Eli Britstein wrote:
> I thought maybe the reason is that this memory is seen by the VM as a
> mapped PCI memory region, so it is not cached,

KVM actually overrides the type of the memory region and always makes it
cached.

Can you try sending the "lspci -vv" output?

Paolo