[Xen-devel] [PATCH v2] x86/mm: pod: Use the correct memory flags for alloc_domheap_page{, s}

[Julien Grall <julien.grall@xxxxxxxxxx>]

The last parameter of alloc_domheap_page{s,} contain the memory flags and
not the order of the allocation.

Use 0 for the call in p2m_pod_set_cache_target as it was before
1069d63c5ef2510d08b83b2171af660e5bb18c63 "x86/mm/p2m: use defines for
page sizes". Note that PAGE_ORDER_4K is also equal to 0 so the behavior
stays the same.

For the call in p2m_pod_offline_or_broken_replace we want to allocate
the new page on the same numa node as the previous page. So retrieve the
numa node and pass it in the memory flags.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

---

Note that the patch has only been build tested.

Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Cc: Keir Fraser <keir@xxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

    Changes in v2:
        - Change the behavior of p2m_pod_offline_or_broken_replace
        to allocate the new page on the same numa node as the previous
        page.
---
 xen/arch/x86/mm/p2m-pod.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c
index 901da37..acd85ea 100644
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -222,7 +222,7 @@ p2m_pod_set_cache_target(struct p2m_domain *p2m, unsigned 
long pod_target, int p
         else
             order = PAGE_ORDER_4K;
     retry:
-        page = alloc_domheap_pages(d, order, PAGE_ORDER_4K);
+        page = alloc_domheap_pages(d, order, 0);
         if ( unlikely(page == NULL) )
         {
             if ( order == PAGE_ORDER_2M )
@@ -471,13 +471,14 @@ p2m_pod_offline_or_broken_replace(struct page_info *p)
 {
     struct domain *d;
     struct p2m_domain *p2m;
+    nodeid_t node = phys_to_nid(page_to_maddr(p));
 
     if ( !(d = page_get_owner(p)) || !(p2m = p2m_get_hostp2m(d)) )
         return;
 
     free_domheap_page(p);
 
-    p = alloc_domheap_page(d, PAGE_ORDER_4K);
+    p = alloc_domheap_page(d, MEMF_node(node));
     if ( unlikely(!p) )
         return;
 
-- 
2.1.4


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