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    Subject[136/139] KVM: Increase NR_IOBUS_DEVS limit to 200
    2.6.33-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Sridhar Samudrala <sri@us.ibm.com>

    (Cherry-picked from commit e80e2a60ff7914dae691345a976c80bbbff3ec74)

    This patch increases the current hardcoded limit of NR_IOBUS_DEVS
    from 6 to 200. We are hitting this limit when creating a guest with more
    than 1 virtio-net device using vhost-net backend. Each virtio-net
    device requires 2 such devices to service notifications from rx/tx queues.

    Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
    Signed-off-by: Avi Kivity <avi@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    include/linux/kvm_host.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/include/linux/kvm_host.h
    +++ b/include/linux/kvm_host.h
    @@ -53,7 +53,7 @@ extern struct kmem_cache *kvm_vcpu_cache
    */
    struct kvm_io_bus {
    int dev_count;
    -#define NR_IOBUS_DEVS 6
    +#define NR_IOBUS_DEVS 200
    struct kvm_io_device *devs[NR_IOBUS_DEVS];
    };




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