libxl: honor autoballoon setting in libxl.conf

libxlGetAutoballoonConf is supposed to honor user-specified
autoballoon setting in libxl.conf. As written, the user-specified
setting could be overwritten by the subsequent logic to check
dom0_mem parameter. If user-specified setting is present and
correct, accept it. Only fallback to checking Xen dom0_mem
command line parameter if user-specfied setting is not present.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>

diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index b5186f289f03f6ea9d7d8aeacbd245c6d90c84c6..ee1e63919dace1096b12e49fd8205abb72599a85 100644 (file)
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -1355,8 +1355,11 @@ libxlGetAutoballoonConf(libxlDriverConfigPtr cfg,
     regex_t regex;
     int res;
 
-    if (virConfGetValueBool(conf, "autoballoon", &cfg->autoballoon) < 0)
+    res = virConfGetValueBool(conf, "autoballoon", &cfg->autoballoon);
+    if (res < 0)
         return -1;
+    else if (res == 1)
+        return 0;
 
     if ((res = regcomp(&regex,
                       "(^| )dom0_mem=((|min:|max:)[0-9]+[bBkKmMgG]?,?)+($| )",