>>> On 04.09.18 at 09:38, <jgr...@suse.com> wrote: > 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.
Stefano, Julien? Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
