On Thu, Aug 10, 2017 at 10:26:06PM -0400, Lan Tianyu wrote:
> Intel Xeon phi chip will support 352 logical threads. For HPC
> usage case, it will create a huge VM with vcpus number as same as host
> cpus. This patch is to increase max vcpu number from 288 to 8192 which
> is current default maximum cpu number for Linux kernel.
>
> Signed-off-by: Lan Tianyu
> ---
> Change since v1:
> * Bump max vcpu number from 352 to 8192
> * Add compat support for new max vcpu limitation
>
> hw/i386/pc_q35.c | 14 +++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index 169a214..e093601 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -299,13 +299,21 @@ static void pc_q35_machine_options(MachineClass *m)
> m->default_display = "std";
> m->no_floppy = 1;
> m->has_dynamic_sysbus = true;
> -m->max_cpus = 288;
> +m->max_cpus = 8192;
> }
>
> +static void pc_q35_2_11_machine_options(MachineClass *m)
> +{
> + pc_q35_machine_options(m);
> + m->alias = "q35";
> +}
> +DEFINE_Q35_MACHINE(v2_11, "pc-q35-2.11", NULL,
> + pc_q35_2_11_machine_options);
> +
> static void pc_q35_2_10_machine_options(MachineClass *m)
> {
> -pc_q35_machine_options(m);
> -m->alias = "q35";
> +pc_q35_2_11_machine_options(m);
You need m->alias=NULL here.
> +m->max_cpus = 288;
> m->numa_auto_assign_ram = numa_legacy_auto_assign_ram;
> }
>
Please add the pc-*-2.11 machine-types in a separate patch. This
way we can add the new machine-types in other series/trees and
deal more easily with conflicts.
You can use commit 465238d9f873a6251223db1669aa4766822a8783
("pc: add 2.10 machine type") as reference.
--
Eduardo
