[Xen-changelog] [xen staging] x86 / ioreq: use a MEMF_no_refcount allocation for server pages...

[patchbot@xxxxxxx]

commit 0a393d881f27ecddd7be762ba24951d6cb67751d
Author:     Paul Durrant <paul@xxxxxxx>
AuthorDate: Tue Mar 24 17:40:09 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 24 17:40:09 2020 +0100

    x86 / ioreq: use a MEMF_no_refcount allocation for server pages...
    
    ... now that it is safe to assign them.
    
    This avoids relying on libxl (or whatever toolstack is in use) setting
    max_pages up with sufficient 'slop' to allow all necessary ioreq server
    pages to be allocated.
    
    Signed-off-by: Paul Durrant <paul@xxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/hvm/ioreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/ioreq.c b/xen/arch/x86/hvm/ioreq.c
index 36fbbcf0ea..70e61788d7 100644
--- a/xen/arch/x86/hvm/ioreq.c
+++ b/xen/arch/x86/hvm/ioreq.c
@@ -376,7 +376,7 @@ static int hvm_alloc_ioreq_mfn(struct hvm_ioreq_server *s, 
bool buf)
         return 0;
     }
 
-    page = alloc_domheap_page(s->target, 0);
+    page = alloc_domheap_page(s->target, MEMF_no_refcount);
 
     if ( !page )
         return -ENOMEM;
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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