[Qemu-devel] [PATCH] preallocate memory after NUMA policy configuration

[Marcelo Tosatti]

(note: applies on top of patchset of current thread)

Preallocate memory after the NUMA policy has been instantiated.
This is necessary to guarantee memory is allocated with 
specified NUMA policy in place.

Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>

diff --git a/backends/hostmem.c b/backends/hostmem.c
index d3f8476..3cfa8a0 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -293,9 +293,6 @@ host_memory_backend_memory_init(UserCreatable *uc, Error 
**errp)
     if (!backend->dump) {
         qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP);
     }
-    if (backend->prealloc) {
-        os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz);
-    }
 
 #ifdef CONFIG_NUMA
     unsigned long maxnode = find_last_bit(backend->host_nodes, MAX_NODES);
@@ -310,6 +307,9 @@ host_memory_backend_memory_init(UserCreatable *uc, Error 
**errp)
         return;
     }
 #endif
+    if (backend->prealloc) {
+        os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz);
+    }
 }
 
 MemoryRegion *