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Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id |
Date: |
Fri, 24 May 2019 16:10:45 +0200 |
On Fri, 24 May 2019 12:35:21 +0200
Laurent Vivier <address@hidden> wrote:
> On pseries, core-ids are strongly binded to a node-id by the command
> line option. If an user tries to add a CPU to the wrong node, he has
> an error but it is not really helpful:
>
> qemu-system-ppc64 ... -smp 1,maxcpus=64,cores=1,threads=1,sockets=1 \
> -numa node,nodeid=0 -numa node,nodeid=1 ...
>
> (qemu) device_add power9_v2.0-spapr-cpu-core,core-id=30,node-id=1
> Error: node-id=1 must match numa node specified with -numa option
>
> This patch improves this error message by giving to the user the good
> topology information (node-id, socket-id and thread-id if they are
> available) to use with the core-id he's providing:
>
> Error: node-id=1 must match numa node specified with -numa option 'node-id
> 0'
>
> Signed-off-by: Laurent Vivier <address@hidden>
> ---
>
> Notes:
> v3: only add the topology to the existing message
> As suggested by Igor replace
> Error: core-id 30 can only be plugged into node-id 0
> by
> Error: node-id=1 must match numa node specified with -numa option
> 'node-id 0'
>
> v2: display full topology in the error message
>
> numa.c | 25 ++++++++++++++++++++++++-
> 1 file changed, 24 insertions(+), 1 deletion(-)
>
> diff --git a/numa.c b/numa.c
> index 3875e1efda3a..7882ec294be4 100644
> --- a/numa.c
> +++ b/numa.c
> @@ -458,6 +458,27 @@ void qmp_set_numa_node(NumaOptions *cmd, Error **errp)
> set_numa_options(MACHINE(qdev_get_machine()), cmd, errp);
> }
>
> +static char *cpu_topology_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_node_id) {
> + if (s->len) {
> + g_string_append_printf(s, ", ");
> + }
> + g_string_append_printf(s, "node-id %"PRId64, cpu->props.node_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);
> +}
turns out we already have such helper: cpu_slot_to_string()
> +
> void numa_cpu_pre_plug(const CPUArchId *slot, DeviceState *dev, Error **errp)
> {
> int node_id = object_property_get_int(OBJECT(dev), "node-id",
> &error_abort);
> @@ -470,8 +491,10 @@ void numa_cpu_pre_plug(const CPUArchId *slot,
> DeviceState *dev, Error **errp)
> "node-id", errp);
> }
> } else if (node_id != slot->props.node_id) {
> + char *topology = cpu_topology_to_string(slot);
> error_setg(errp, "node-id=%d must match numa node specified "
> - "with -numa option", node_id);
> + "with -numa option '%s'", node_id, topology);
> + g_free(topology);
> }
> }
>
- [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Laurent Vivier, 2019/05/24
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id,
Igor Mammedov <=
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Laurent Vivier, 2019/05/24
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Eduardo Habkost, 2019/05/24
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Laurent Vivier, 2019/05/27
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Igor Mammedov, 2019/05/27
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Laurent Vivier, 2019/05/27
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Eduardo Habkost, 2019/05/28
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Laurent Vivier, 2019/05/28
- Re: [Qemu-devel] [PATCH v3] numa: improve cpu hotplug error message with a wrong node-id, Igor Mammedov, 2019/05/28