[libvirt] [PATCH] memtune: Let virsh know the unlimited value for memory tunables

[Nikunj A. Dadhania]

From: Nikunj A. Dadhania <nikunj at linux.vnet.ibm.com>

Display unlimited when the memory cgroup settings says so. Unlimited is
represented by INT64_MAX in memory cgroup.

Signed-off-by: Nikunj A. Dadhania <nikunj at linux.vnet.ibm.com>
Reported-by: Justin Clift <jclift at redhat.com>
---
 tools/virsh.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/tools/virsh.c b/tools/virsh.c
index 55e2a68..bee875c 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -2987,9 +2987,15 @@ cmdMemtune(vshControl * ctl, const vshCmd * cmd)
                              params[i].value.l);
                     break;
                 case VIR_DOMAIN_MEMORY_PARAM_ULLONG:
-                    vshPrint(ctl, "%-15s: %llu\n", params[i].field,
-                             params[i].value.ul);
+                {
+                    unsigned long long max_kbytes = INT64_MAX >> 10;
+                    if (params[i].value.ul == max_kbytes)
+                        vshPrint(ctl, "%-15s: unlimited\n", params[i].field);
+                    else
+                        vshPrint(ctl, "%-15s: %llu\n", params[i].field,
+                                 params[i].value.ul);
                     break;
+                }
                 case VIR_DOMAIN_MEMORY_PARAM_DOUBLE:
                     vshPrint(ctl, "%-15s: %f\n", params[i].field,
                              params[i].value.d);