Re: [PATCH v1 10/14] s390x/pv: check initial, not maximum RAM size

[Nina Schoetterl-Glausch <nsg@linux.ibm.com>]

On Tue, 2024-09-10 at 19:58 +0200, David Hildenbrand wrote:
> We actually want to check the available RAM, not the maximum RAM size.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Nit below.
> ---
>  target/s390x/kvm/pv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/target/s390x/kvm/pv.c b/target/s390x/kvm/pv.c
> index dde836d21a..424cce75ca 100644
> --- a/target/s390x/kvm/pv.c
> +++ b/target/s390x/kvm/pv.c
> @@ -133,7 +133,7 @@ bool s390_pv_vm_try_disable_async(S390CcwMachineState *ms)
>       * If the feature is not present or if the VM is not larger than 2 GiB,
>       * KVM_PV_ASYNC_CLEANUP_PREPARE fill fail; no point in attempting it.
>       */
> -    if ((MACHINE(ms)->maxram_size <= 2 * GiB) ||
> +    if ((MACHINE(ms)->ram_size <= 2 * GiB) ||
>          !kvm_check_extension(kvm_state, KVM_CAP_S390_PROTECTED_ASYNC_DISABLE)) {
>          return false;
>      }

If I understood the kernel code right, the decision is made wrt
the size of the gmap address space, which is the same as the
limit set for the VM. So using s390_get_memory_limit would be
semantically cleaner.