File 23592-xenpaging_start_paging_in_the_middle_of_g... of Package xen

Overview Repositories Revisions Requests Users Attributes Meta

File 23592-xenpaging_start_paging_in_the_middle_of_gfn_range.patch of Package xen (Revision db46a29eba58b7202aa1204a97e352dc)

Currently displaying revision db46a29eba58b7202aa1204a97e352dc , Show latest

changeset:   23592:1e44e75d889c
user:        Olaf Hering <olaf@aepfle.de>
date:        Fri Jun 10 10:47:23 2011 +0200
files:       tools/xenpaging/policy_default.c
description:
xenpaging: start paging in the middle of gfn range

Set the starting gfn to somewhere in the middle of the gfn range to
avoid paging during BIOS startup. This can speedup booting of a guest.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Ian Jackson <ian.jackson.citrix.com>

---
 tools/xenpaging/policy_default.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: xen-4.1.2-testing/tools/xenpaging/policy_default.c
===================================================================
--- xen-4.1.2-testing.orig/tools/xenpaging/policy_default.c
+++ xen-4.1.2-testing/tools/xenpaging/policy_default.c
@@ -69,6 +69,10 @@ int policy_init(xenpaging_t *paging)
     /* Don't page out page 0 */
     set_bit(0, bitmap);
 
+    /* Start in the middle to avoid paging during BIOS startup */
+    current_gfn = max_pages / 2;
+    current_gfn -= paging->num_pages / 2;
+
     rc = 0;
  out:
     return rc;

Places

File 23592-xenpaging_start_paging_in_the_middle_of_gfn_range.patch of Package xen (Revision db46a29eba58b7202aa1204a97e352dc)

Places