From 641a145d73fdc3dd9350fd57b3d3247abf101c05 Mon Sep 17 00:00:00 2001 From: Peter Krempa Date: Wed, 27 May 2015 15:04:14 +0200 Subject: [PATCH] qemu: process: Update current balloon state to maximum on vm startup After libvirt issues the balloon resize command, the current balloon size needs to be changed to the maximum memory size since the vCPUs were not started and thus the balloon driver could not return the memory. Since GetXMLDesc and other APIs return the balloon size without updating it in case they are not able to obtain the job and the memory balloon does not support the asynchronous event the sizing might be incorrect. --- src/qemu/qemu_process.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index d5d936976..7f154f034 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -4897,6 +4897,11 @@ int qemuProcessStart(virConnectPtr conn, goto cleanup; } + /* Since CPUs were not started yet, the ballon could not return the memory + * to the host and thus cur_balloon needs to be updated so that GetXMLdesc + * and friends return the correct size in case they can't grab the job */ + vm->def->mem.cur_balloon = virDomainDefGetMemoryActual(vm->def); + VIR_DEBUG("Detecting actual memory size for video device"); if (qemuProcessUpdateVideoRamSize(driver, vm, asyncJob) < 0) goto cleanup; -- 2.39.5