Re: [Qemu-devel] [PATCH] kvm: add detail error message when fail to add ioeventfd

[Gleb Natapov <gleb@redhat.com>]

On Wed, May 22, 2013 at 12:57:35PM +0800, Amos Kong wrote:
> I try to hotplug 28 * 8 multiple-function devices to guest with
> old host kernel, ioeventfds in host kernel will be exhausted, then
> qemu fails to allocate ioeventfds for blk/nic devices.
> 
> It's better to add detail error here.
> 
Applied, thanks.

> Signed-off-by: Amos Kong <akong@redhat.com>
> ---
>  kvm-all.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/kvm-all.c b/kvm-all.c
> index 8222729..3d5f7b7 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -813,6 +813,8 @@ static void kvm_mem_ioeventfd_add(MemoryListener *listener,
>      r = kvm_set_ioeventfd_mmio(fd, section->offset_within_address_space,
>                                 data, true, section->size, match_data);
>      if (r < 0) {
> +        fprintf(stderr, "%s: error adding ioeventfd: %s\n",
> +                __func__, strerror(-r));
>          abort();
>      }
>  }
> @@ -843,6 +845,8 @@ static void kvm_io_ioeventfd_add(MemoryListener *listener,
>      r = kvm_set_ioeventfd_pio(fd, section->offset_within_address_space,
>                                data, true, section->size, match_data);
>      if (r < 0) {
> +        fprintf(stderr, "%s: error adding ioeventfd: %s\n",
> +                __func__, strerror(-r));
>          abort();
>      }
>  }
> -- 
> 1.7.1

--
			Gleb.