Re: [PATCH v4 1/1] KVM: s390: diag9c (directed yield) forwarding

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, 22 Feb 2021 13:41:01 +0100
Pierre Morel <pmorel@xxxxxxxxxxxxx> wrote:

> When we intercept a DIAG_9C from the guest we verify that the
> target real CPU associated with the virtual CPU designated by
> the guest is running and if not we forward the DIAG_9C to the
> target real CPU.
> 
> To avoid a diag9c storm we allow a maximal rate of diag9c forwarding.
> 
> The rate is calculated as a count per second defined as a new
> parameter of the s390 kvm module: diag9c_forwarding_hz .
> 
> The default value of 0 is to not forward diag9c.
> 
> Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
> ---
>  Documentation/virt/kvm/s390-diag.rst | 33 ++++++++++++++++++++++++++++
>  arch/s390/include/asm/kvm_host.h     |  1 +
>  arch/s390/include/asm/smp.h          |  1 +
>  arch/s390/kernel/smp.c               |  1 +
>  arch/s390/kvm/diag.c                 | 31 +++++++++++++++++++++++---
>  arch/s390/kvm/kvm-s390.c             |  6 +++++
>  arch/s390/kvm/kvm-s390.h             |  8 +++++++
>  7 files changed, 78 insertions(+), 3 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@xxxxxxxxxx>




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux