From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: IVSHMEM device performance Date: Sun, 17 Apr 2016 14:03:40 +0200 Message-ID: <57137B9C.201@redhat.com> References: <570F90DF.7040904@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit To: Eli Britstein , "kvm@vger.kernel.org" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56490 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751585AbcDQMDo (ORCPT ); Sun, 17 Apr 2016 08:03:44 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 17/04/2016 09:18, Eli Britstein wrote: > Attached. Also, if need to change ioremap to ioremap_cache, please > advise where. I assume in mmap it is already too late. No, you need not do that. If memory was uncached, the performance penalty would be 100x or worse. Paolo