Am Freitag, 4. Oktober 2024, 12:29:57 schrieben Sie: > On 04.10.24 12:05, Niels Dettenbach wrote: > > Virtual machines under Xen Hypervisor (DomU) running in Xen PV mode use a > > special, nonstandard synthetized CPU topology which "just works" under > > kernels 6.9.x while newer kernels wrongly assuming a "crash kernel" and > > disable SMP (reducing to one CPU core) because the newer topology > > implementation produces a wrong error "[Firmware Bug]: APIC enumeration > > order not specification compliant" after new topology checks which are > > improper for Xen PV platform. As a result, the kernel disables SMP and > > activates just one CPU core within the PV DomU "VM" (DomU in PV mode). > > > > The patch disables the regarding checks if it is running in Xen PV > > mode (only) and bring back SMP / all CPUs as in the past to such DomU > > VMs. The Xen subsystem takes care of the proper interaction between > > "guest" (DomU) and the "host" (Dom0). > > > > Signed-off-by: Niels Dettenbach <nd@xxxxxxxxxxxx> > > Does the attached patch instead of yours help? > > Compile tested only. Thanks Jürgen - will try until monday... niels.
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