Re: [PATCH 0/1] KVM: s390: backport for stable of "KVM: s390: index

On Mon, Sep 20, 2021 at 05:06:15PM +0200, Christian Borntraeger wrote:

Stable team,

here is a backport for 4.19 of commit a3e03bc1368 ("KVM: s390: index kvm->arch.idle_mask by vcpu_idx") This basically removes the kick_mask parts that were introduced with kernel 5.0 and fixes up the location of the idle_mask to the older place.

Now queued up, thanks.

FWIW, it might be a good idea to also backport 8750e72a79dd ("KVM: remember position in kvm->vcpus array") to avoid a performance regression for large guests (many vCPUs) when this patch is applied. @Paolo Bonzini, would you be ok with 8750e72a79dd in older stable releases?

That would also have to go into 5.4.y, right?

thanks,

greg k-h