From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andres Lagar-Cavilla Subject: [PATCH 0 of 2] x86/mm: Two hypervisor paging fixes Date: Mon, 09 Jan 2012 16:41:25 -0500 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com Cc: andres@gridcentric.ca, tim@xen.org, olaf@aepfle.de, adin@gridcentric.ca List-Id: xen-devel@lists.xenproject.org - Disallow for good paging_prep: it's unsafe - Allow paging in of a page in paged-out state. This shortcuts the need to reference the page and trigger a populate event, thus saving a complete control stack round-trip. Signed-off-by: Andres Lagar-Cavilla Acked-by: Tim Deegan xen/arch/x86/mm/p2m.c | 15 +++++++++++---- xen/arch/x86/mm/p2m.c | 4 ++++ 2 files changed, 15 insertions(+), 4 deletions(-)