Bug 58771
Summary: | VM performance degradation after KVM QEMU migration or save/restore with Intel EPT enabled | ||
---|---|---|---|
Product: | Virtualization | Reporter: | Chris (ccormier) |
Component: | kvm | Assignee: | virtualization_kvm |
Status: | RESOLVED INVALID | ||
Severity: | high | CC: | bonzini |
Priority: | P1 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 3.0+ | Subsystem: | |
Regression: | Yes | Bisected commit-id: |
Description
Chris
2013-05-24 15:34:26 UTC
Apologies, mentions of Kernel 2.8.x above should be 2.6. This is a QEMU bug. It is fixed by commit fc1c4a5 (migration: drop MADVISE_DONT_NEED for incoming zero pages, 2013-10-24) which will be in QEMU 1.7. Distros can backport that commit to QEMU 1.6. It cannot be applied alone to QEMU 1.5 and older. |