From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Tripathy Subject: Re: Can't see more than 3.5GB of RAM / UEFI / no e820 memory map detected Date: Tue, 28 Aug 2012 20:36:19 +0100 Message-ID: <503D1DB3.9000203@abpni.co.uk> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 24/08/2012 21:05, Keir Fraser wrote: > On 24/08/2012 18:39, "Jonathan Tripathy" wrote: > >>> That flipping has nothing to do with UEFI, just with the way grub.efi >>> works. >>> >>> Proper UEFI support implies use of EFI's boot and run time services, >>> which only xen.efi currently does (and which, for those run time >>> services that get made available for use by Dom0, also requires an >>> enabled Dom0 kernel). >>> >> Thanks for the clarification. >> >> So from a security/reliability standpoint, nothing will be affected by >> flipping the if block? > It should simply make it more likely that Xen sees all your RAM. ;) > > -- Keir > > Hi Everyone, I reversed the if block in setup.c and now my server can see the full 32GB of RAM. I haven't submitted a patch yet as we have run into another (possibly unrelated to xen) issue with this server build that we are working on. Once we complete our full testing, a patch will be submitted :) Thanks