From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefano.stabellini@eu.citrix.com Subject: [PATCH 4/4] xen: do not create the extra e820 region at an addr lower than 4G Date: Tue, 12 Apr 2011 12:19:52 +0100 Message-ID: <1302607192-21355-4-git-send-email-stefano.stabellini@eu.citrix.com> References: Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xensource.com, konrad.wilk@oracle.com, jeremy@goop.org, Stefano.Stabellini@eu.citrix.com, yinghai@kernel.org, hpa@linux.intel.com, mingo@elte.hu, Stefano Stabellini List-Id: xen-devel@lists.xenproject.org From: Stefano Stabellini Do not add the extra e820 region at a physical address lower than 4G because it breaks e820_end_of_low_ram_pfn(). It is OK for us to move the xen_extra_mem_start up and down because this is the index of the memory that can be ballooned in/out - it is memory not available to the kernel during bootup. Signed-off-by: Stefano Stabellini --- arch/x86/xen/setup.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 9c38bd1..a51e010 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -229,7 +229,7 @@ char * __init xen_memory_setup(void) memcpy(map_raw, map, sizeof(map)); e820.nr_map = 0; - xen_extra_mem_start = mem_end; + xen_extra_mem_start = max((1ULL << 32), mem_end); for (i = 0; i < memmap.nr_entries; i++) { unsigned long long end; -- 1.7.2.3