From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: Re: [PATCH v3 2/2] xen/setup: Remap Xen Identity Mapped RAM Date: Wed, 27 Aug 2014 11:28:10 +0100 Message-ID: <53FDB2BA.8080506@citrix.com> References: <1407778441-26604-1-git-send-email-mrushton@amazon.com> <1407778441-26604-2-git-send-email-mrushton@amazon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1407778441-26604-2-git-send-email-mrushton@amazon.com> Sender: linux-kernel-owner@vger.kernel.org To: Matt Rushton , konrad.wilk@oracle.com, boris.ostrovsky@oracle.com Cc: msw@amazon.com, linux-kernel@vger.kernel.org, xen-devel@lists.xensource.com, Matt Rushton List-Id: xen-devel@lists.xenproject.org On 11/08/14 18:34, Matt Rushton wrote: > Instead of ballooning up and down dom0 memory this remaps the existing mfns > that were replaced by the identity map. The reason for this is that the > existing implementation ballooned memory up and and down which caused dom0 > to have discontiguous pages. In some cases this resulted in the use of bounce > buffers which reduced network I/O performance significantly. This change will > honor the existing order of the pages with the exception of some boundary > conditions. Applied to devel/for-linus-3.18. Patch #1 is already present in 3.17-rc1. Thanks. David