[Xen-devel] [PATCH V3 2/2] ts-debian-hvm-install: fix guest memory size

[Wei Liu <wei.liu2@xxxxxxxxxx>]

If the host has more than 5G free memory, change guest memory size to 5G
to catch any error that triggers by crossing 4G boundary. Otherwise
guest memory size is set to 768 MB (taken from ts-redhat-install) which
should be a safe value to run this testcase on every host.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 ts-debian-hvm-install |   15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/ts-debian-hvm-install b/ts-debian-hvm-install
index 1b58108..1bca1f7 100755
--- a/ts-debian-hvm-install
+++ b/ts-debian-hvm-install
@@ -32,7 +32,8 @@ $gn ||= 'ovmf';
 
 our $ho= selecthost($whhost);
 
-our $ram_mb=   6000;
+# guest memory size will be set based on host free memory, see below
+our $ram_mb;
 our $disk_mb= 10000;
 
 our $guesthost= "$gn.guest.osstest";
@@ -166,6 +167,18 @@ sub prep () {
     });
 }
 
+# If host has >5G free memory, create a guest with 5G memory to catch
+# any error that triggers cross 4G boundary
+my $host_freemem_mb = host_get_free_memory($ho, $toolstack);
+my $ram_minslop = 100;
+my $ram_lots = 5000;
+if ($host_freemem_mb > $ram_lots + $ram_minslop) {
+    $ram_mb = $ram_lots;
+} else {
+    $ram_mb = 768;
+}
+logm("Host has $host_freemem_mb MB free memory, setting guest memory size to 
$ram_mb MB");
+
 if (!$stage) {
     prep();
     guest_create($gho,$toolstack);
-- 
1.7.10.4


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