On 03/09/18 15:41, Jan Beulich wrote: >>>> On 31.08.18 at 17:22, <jgr...@suse.com> wrote: >> The topology information obtainable via XEN_SYSCTL_cputopoinfo is >> filled rather weird: the size of the array is derived from the highest >> online cpu number, so in case there are trailing offline cpus they >> will not be included. >> >> On a dual core system with 4 threads booted with smt=0 without this >> patch xl info -n will print: >> >> cpu_topology : >> cpu: core socket node >> 0: 0 0 0 >> 1: 0 0 0 >> 2: 1 0 0 >> >> while with this patch the output is: >> >> cpu_topology : >> cpu: core socket node >> 0: 0 0 0 >> 1: 0 0 0 >> 2: 1 0 0 >> 3: 1 0 0 >> >> Signed-off-by: Juergen Gross <jgr...@suse.com> > > Reviewed-by: Jan Beulich <jbeul...@suse.com> > for x86. I'd like this to have an ARM ack as well, though, for > there possibly being differences in how cpu_present_map is > handled in their case. In particular I notice that the only access > to the variable is in smp_prepare_cpus().
How relevant is that information for arm at all? cpu_to_core(i) et al always return 0. So topology information is not really helpful. Juergen _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
