https://bugzilla.kernel.org/show_bug.cgi?id=190211 Bug ID: 190211 Summary: memory ballooning doesn't take on boot since approx kernel 4.5.3 Product: Virtualization Version: unspecified Kernel Version: 4.9, 4.8.14, 4.8.1, 4.7.2, 4.6.2 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: ap@xxxxxxxxxx Regression: No Just noticed that on restart or bootup memory ballooning stopped working. The guest boots with the maximum allowed memory rather than the "current" setting in libvirt. If I request a memory shrink after boot, the balloon works and memory available shrinks as requested. I went through the following guest kernels: 4.9, 4.8.14, 4.8.1, 4.7.2, 4.6.2, 4.5.3 (worked), 4.4.4 (worked). These were custom compiles. Debian official kernels for 4.8.0 and 4.7.0 also failed. I used libvirt 2.5.0, 2.4.0 and 1.2.20 Qemu versions: 2.5 and 2.7 Debian stretch for the guest, wheezy and stretch for the host. Host kernels 4.3.3, 4.8.6 and 4.8.14 The fact that dropping kernel versions made it work once I hit 4.5.3 makes me think there's an issue kernel-side. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
