File 54ef188e-honor-MEMF_no_refcount-in-alloc_heap_pages.patch of Package xen.481

# Commit 17294e69c4cd299da7ba3ca8077e24be76bd61b1
# Date 2015-02-26 13:58:54 +0100
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
honor MEMF_no_refcount in alloc_heap_pages()

Non-anonymous allocations with this flag set should - for the purpose
of the availability check - be treated just like anonymous ones, as
they wouldn't lead to a reduction of ->outstanding_pages.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Tim Deegan <tim@xen.org>

--- a/xen/common/page_alloc.c
+++ b/xen/common/page_alloc.c
@@ -600,7 +600,8 @@ static struct page_info *alloc_heap_page
      */
     if ( (outstanding_claims + request >
           total_avail_pages + tmem_freeable_pages()) &&
-          (d == NULL || d->outstanding_pages < request) )
+          ((memflags & MEMF_no_refcount) ||
+           !d || d->outstanding_pages < request) )
         goto not_found;
 
     /*