CPU is enough for kdump kernel to dump vmcore on most of systems.
However, you can also specify nr_cpus=X to enable multiple processors
- in kdump kernel. In this case, "disable_cpu_apicid=" is needed to
- tell kdump kernel which cpu is 1st kernel's BSP. Please refer to
- admin-guide/kernel-parameters.txt for more details.
+ in kdump kernel.
With CONFIG_SMP=n, the above things are not related.
to use multi-thread programs with it, such as parallel dump feature of
makedumpfile. Otherwise, the multi-thread program may have a great
performance degradation. To enable multi-cpu support, you should bring up an
- SMP dump-capture kernel and specify maxcpus/nr_cpus, disable_cpu_apicid=[X]
- options while loading it.
+ SMP dump-capture kernel and specify maxcpus/nr_cpus options while loading it.
* For s390x there are two kdump modes: If a ELF header is specified with
the elfcorehdr= kernel parameter, it is used by the kdump kernel as it