Re: [Qemu-devel] [PULL 23/29] numa: use possible_cpus for not mapped CPUs check

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 17 May 2017 10:07:18 +0200
Markus Armbruster <armbru@redhat.com> wrote:

> Eduardo Habkost <ehabkost@redhat.com> writes:
> 
> > From: Igor Mammedov <imammedo@redhat.com>
> >
> > and remove corresponding part in numa.c that uses
> > node_cpu bitmaps.
> >
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> > Reviewed-by: Andrew Jones <drjones@redhat.com>
> > Message-Id: <1494415802-227633-16-git-send-email-imammedo@redhat.com>
> > Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> >  hw/core/machine.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >  numa.c            | 10 ----------
> >  2 files changed, 58 insertions(+), 10 deletions(-)
> >
> > diff --git a/hw/core/machine.c b/hw/core/machine.c
> > index 64e2a4ff2c..fd6a436064 100644
> > --- a/hw/core/machine.c
> > +++ b/hw/core/machine.c
> > @@ -20,6 +20,7 @@
> >  #include "sysemu/numa.h"
> >  #include "qemu/error-report.h"
> >  #include "qemu/cutils.h"
> > +#include "sysemu/numa.h"
> >  
> >  static char *machine_get_accel(Object *obj, Error **errp)
> >  {
> > @@ -678,9 +679,66 @@ bool machine_mem_merge(MachineState *machine)
> >      return machine->mem_merge;
> >  }
> >  
> > +static char *cpu_slot_to_string(const CPUArchId *cpu)
> > +{
> > +    GString *s = g_string_new(NULL);
> > +    if (cpu->props.has_socket_id) {
> > +        g_string_append_printf(s, "socket-id: %"PRId64, cpu->props.socket_id);
> > +    }
> > +    if (cpu->props.has_core_id) {
> > +        if (s->len) {
> > +            g_string_append_printf(s, ", ");
> > +        }
> > +        g_string_append_printf(s, "core-id: %"PRId64, cpu->props.core_id);
> > +    }
> > +    if (cpu->props.has_thread_id) {
> > +        if (s->len) {
> > +            g_string_append_printf(s, ", ");
> > +        }
> > +        g_string_append_printf(s, "thread-id: %"PRId64, cpu->props.thread_id);
> > +    }
> > +    return g_string_free(s, false);
> > +}
> > +
> > +static void machine_numa_validate(MachineState *machine)
> > +{
> > +    int i;
> > +    GString *s = g_string_new(NULL);
> > +    MachineClass *mc = MACHINE_GET_CLASS(machine);
> > +    const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(machine);
> > +
> > +    assert(nb_numa_nodes);
> > +    for (i = 0; i < possible_cpus->len; i++) {
> > +        const CPUArchId *cpu_slot = &possible_cpus->cpus[i];
> > +
> > +        /* at this point numa mappings are initilized by CLI options
> > +         * or with default mappings so it's sufficient to list
> > +         * all not yet mapped CPUs here */
> > +        /* TODO: make it hard error in future */
> > +        if (!cpu_slot->props.has_node_id) {
> > +            char *cpu_str = cpu_slot_to_string(cpu_slot);
> > +            g_string_append_printf(s, "%sCPU %d [%s]", s->len ? ", " : "", i,
> > +                                   cpu_str);
> > +            g_free(cpu_str);
> > +        }
> > +    }
> > +    if (s->len) {
> > +        error_report("warning: CPU(s) not present in any NUMA nodes: %s",
> > +                     s->str);
> > +        error_report("warning: All CPU(s) up to maxcpus should be described "
> > +                     "in NUMA config, ability to start up with partial NUMA "
> > +                     "mappings is obsoleted and will be removed in future");  
> 
> I can see this gripes in output of make check.  Shouldn't you suppress
> them on qtest_enabled(), like we do elsewhere?
I'll look into it and add a patch into followup series to suppress it.

> 
> > +    }
> > +    g_string_free(s, true);
> > +}  
> 
> [...]