* Ryan Harper <ryanh@xxxxxxxxxx> [2006-05-01 17:00]:
> This patch modifies the increase_reservation and populate_physmap
> hypercalls used to allocate memory to a domain. With numa support
> enabled we balance the allocation by using the domain's vcpu placement
> as a method of distributing the pages locally to the physical cpu the
> vcpus will run upon.
Updated to remove CONFIG_NUMA ifdefs.
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
(512) 838-9253 T/L: 678-9253
ryanh@xxxxxxxxxx
diffstat output:
memory.c | 26 ++++++++++++++++++++++----
1 files changed, 22 insertions(+), 4 deletions(-)
Signed-off-by: Ryan Harper <ryanh@xxxxxxxxxx>
Signed-off-by: Ryan Grimm <grimm@xxxxxxxxxx>
---
# HG changeset patch
# User Ryan Harper <ryanh@xxxxxxxxxx>
# Node ID b92d38d9be2808b73dd87e0f3d61858540dc8f69
# Parent 15fba7ca6975a8aef6cb5d290767aeacc7304cd8
This patch modifies the increase_reservation and populate_physmap
hypercalls used to allocate memory to a domain. We balance the
allocation by using the domain's vcpu placement as a method of
distributing the pages locally to the physical cpu the vcpus will
run upon.
diff -r 15fba7ca6975 -r b92d38d9be28 xen/common/memory.c
--- a/xen/common/memory.c Thu May 11 20:48:10 2006
+++ b/xen/common/memory.c Thu May 11 20:49:50 2006
@@ -39,6 +39,12 @@
{
struct page_info *page;
unsigned long i, mfn;
+ int max_vcpu_id = 0;
+ struct vcpu *v;
+
+ for_each_vcpu (d, v)
+ if ( v->vcpu_id > max_vcpu_id )
+ max_vcpu_id = v->vcpu_id;
if ( !guest_handle_is_null(extent_list) &&
!guest_handle_okay(extent_list, nr_extents) )
@@ -56,8 +62,11 @@
return i;
}
- if ( unlikely((page = alloc_domheap_pages(
- d, extent_order, flags)) == NULL) )
+ /* spread each allocation across the total number of
+ * vcpus allocated to this domain */
+ if ( unlikely((page = __alloc_domheap_pages( d,
+ (d->vcpu[i % (max_vcpu_id+1)])->processor,
+ extent_order, flags )) == NULL) )
{
DPRINTK("Could not allocate order=%d extent: "
"id=%d flags=%x (%ld of %d)\n",
@@ -88,6 +97,12 @@
{
struct page_info *page;
unsigned long i, j, gpfn, mfn;
+ int max_vcpu_id = 0;
+ struct vcpu *v;
+
+ for_each_vcpu (d, v)
+ if ( v->vcpu_id > max_vcpu_id )
+ max_vcpu_id = v->vcpu_id;
if ( !guest_handle_okay(extent_list, nr_extents) )
return 0;
@@ -107,8 +122,11 @@
if ( unlikely(__copy_from_guest_offset(&gpfn, extent_list, i, 1)) )
goto out;
- if ( unlikely((page = alloc_domheap_pages(
- d, extent_order, flags)) == NULL) )
+ /* spread each allocation across the total number of
+ * vcpus allocated to this domain */
+ if ( unlikely((page = __alloc_domheap_pages( d,
+ (d->vcpu[i % (max_vcpu_id+1)])->processor,
+ extent_order, flags )) == NULL) )
{
DPRINTK("Could not allocate order=%d extent: "
"id=%d flags=%x (%ld of %d)\n",
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