[Xen-changelog] [xen master] libxl: set the default grant/maptrack frames at structure init

[patchbot@xxxxxxx]

commit ec3cf54fd2f32d3f8bff94931a7ac2c13cbc7c76
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Mon Oct 9 14:30:06 2017 +0100
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Mon Oct 9 15:19:30 2017 +0100

    libxl: set the default grant/maptrack frames at structure init
    
    libxl_domain_build_info had both the maptrack and grant frames set to
    0 by default, forcing the client of libxl to set a sane default.
    
    This is not backwards compatible, so instead initialize both
    max_grant_frames and max_maptrack_frames to a sane default (ie: like
    previous behavior).
    
    This fixes the libvirt tests in osstest.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/libxl.h         | 3 +++
 tools/libxl/libxl_types.idl | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index e5ef920..f82b91e 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -322,6 +322,9 @@
  */
 #define LIBXL_HAVE_BUILDINFO_GRANT_LIMITS 1
 
+#define LIBXL_MAX_GRANT_FRAMES_DEFAULT 32
+#define LIBXL_MAX_MAPTRACK_FRAMES_DEFAULT 1024
+
 /*
  * LIBXL_HAVE_BUILDINFO_* indicates that libxl_domain_build_info has
  * the field represented by the '*'. The original position of those
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index ade359e..2d0bb8a 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -480,8 +480,8 @@ libxl_domain_build_info = Struct("domain_build_info",[
 
     ("vnuma_nodes", Array(libxl_vnode_info, "num_vnuma_nodes")),
 
-    ("max_grant_frames",    uint32),
-    ("max_maptrack_frames", uint32),
+    ("max_grant_frames",    uint32, {'init_val': 
'LIBXL_MAX_GRANT_FRAMES_DEFAULT'}),
+    ("max_maptrack_frames", uint32, {'init_val': 
'LIBXL_MAX_MAPTRACK_FRAMES_DEFAULT'}),
     
     ("device_model_version", libxl_device_model_version),
     ("device_model_stubdomain", libxl_defbool),
--
generated by git-patchbot for /home/xen/git/xen.git#master

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