[libvirt] [PATCH] lxc: fix setmem effect on a running LXC machine

[Erik Skultety]

When user calls setmem on a running LXC machine, we do update its cgroup
entry (which is in odds with the original bug report, possibly resolved
by later versions), however we neither update domain's runtime XML nor
we update our internal structures and this patch fixes it.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1131919
---
 src/lxc/lxc_driver.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c
index b3e506f..03a00a9 100644
--- a/src/lxc/lxc_driver.c
+++ b/src/lxc/lxc_driver.c
@@ -749,6 +749,10 @@ static int lxcDomainSetMemoryFlags(virDomainPtr dom, unsigned long newmem,
                                "%s", _("Failed to set memory for domain"));
                 goto cleanup;
             }
+
+            vm->def->mem.cur_balloon = newmem;
+            if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
+                goto cleanup;
         }
 
         if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
-- 
1.9.3