File 23592-xenpaging_start_paging_in_the_middle_of_g... of Package xen

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File 23592-xenpaging_start_paging_in_the_middle_of_gfn_range.patch of Package xen (Revision 5650c10eb1834644814d57cdc5c90907)

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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;

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File 23592-xenpaging_start_paging_in_the_middle_of_gfn_range.patch of Package xen (Revision 5650c10eb1834644814d57cdc5c90907)

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