Virtualization FAQ ​

1. Why is the QEMU hot patch created with the libcareplus tool unable to be loaded ​

This issue occurs because the QEMU version is inconsistent with the hot patch version. You can download the source code of the corresponding QEMU version and use the buildID to ensure that the environment for creating a hot patch matches the environment for creating a QEMU package. If you do not have the environment for making the QEMU version, you can compile and install the QEMU version and use the buildID of /usr/libexec/qemu-kvm in the self-compiled package.

2. Why is the hot patch made using the libcareplus tool loaded but not working ​

Check whether the functions of the patch are infinite loop, non-exit, and recursive functions or initialization functions, inline functions, and short functions that are shorter than 5 bytes. These functions are within the constraints.

3. Why does the initial display of kvmtop show high variability from two samples taken 0.05 seconds apart ​

This occurs due to a known limitation in the open source top framework, with no current resolution available.