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Peter Krempa
c212e0c779
qemu: process: Improve update of maximum balloon state at startup
In commit 641a145d73fdc3dd9350fd57b3d3247abf101c05 I've added code that resets the balloon memory value to full size prior to resuming the vCPUs since the size certainly was not reduced at that point. Since qemuProcessStart is used also in code paths with already booted up guests (migration, save/restore) the assumption is not entirely true since the guest might already been running before. This patch adds a function that queries the monitor rather than using the full size since a balloon event would not be reissued in case we are recovering a saved migration state. Additionally the new function is used also when reconnecting to a VM after libvirtd restart since we might have missed a few balloon events while libvirtd was not running.
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LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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