On Wed, Dec 14, 2016 at 4:25 PM, Baoquan He <bhe at redhat.com> wrote: > On 12/14/16 at 04:15pm, Liu ping fan wrote: >> On Wed, Dec 14, 2016 at 3:40 PM, Baoquan He <bhe at redhat.com> wrote: >> > On 12/14/16 at 02:11pm, Pingfan Liu wrote: >> >> kexec-tools always allocates program headers for each possible cpu. This >> >> incurs zero PT_NOTE for offline cpu. We mark this case so that later, >> >> the capture kernel can distinguish it from the mistake of allocated >> >> program header. >> >> The counterpart of the capture kernel comes in next patch. >> > >> > When you execute dmesg on your testing machine and grep nr_cpu_ids, >> > what's the value of nr_cpu_ids? >> > >> nr_cpu_ids=128 > > And what's the cpu number of in "lscpu" command? NUMA node1 CPU(s): 0-7 The system booted up with 128 possible cpu and only 8 online. Also I tested on x86 guest, after bootup with 8 cpus, then offline 4 of them, the zero PT_NOTE warning buzz too.
