diff options
Diffstat (limited to 'results/classifier/gemma3:12b/kvm/1926249')
| -rw-r--r-- | results/classifier/gemma3:12b/kvm/1926249 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/kvm/1926249 b/results/classifier/gemma3:12b/kvm/1926249 new file mode 100644 index 000000000..165076c50 --- /dev/null +++ b/results/classifier/gemma3:12b/kvm/1926249 @@ -0,0 +1,20 @@ + +postcopy migration fails in hirsute (solved) + +FYI: this is an intended change, can be overwritten via config and this bug is mostly to have something puzzled users can find via search engines to explain and solve their issue. + +postcopy migration can in some cases be very useful +=> https://wiki.qemu.org/Features/PostCopyLiveMigration + +But with Hirsute kernel being 5.11 that now contains the following upstream change +=> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0d4730ac2 + +Due to that postcopy migration will fail like: + ++ lxc exec testkvm-focal-from -- virsh migrate --unsafe --live --postcopy --postcopy-after-precopy kvmguest-focal-postcopy qemu+ssh://10.85.93.248/system +error: internal error: unable to execute QEMU command 'migrate-set-capabilities': Postcopy is not supported + +This will also apply to e.g. a Focal-HWE kernel once on v5.11 or to Focal userspaces in a container under a Hirsute kernel (that is the example above). + +This was done for security reasons, if you want/need to re-enable un-limited userfault handling to be able to use postcopy again you'd want/need to set the control knob to one like: +$ sudo sysctl -w "vm.unprivileged_userfaultfd=1" \ No newline at end of file |