• Pankaj Gupta's avatar
    tuntap: Increase the number of queues in tun. · baf71c5c
    Pankaj Gupta authored
    Networking under kvm works best if we allocate a per-vCPU RX and TX
    queue in a virtual NIC. This requires a per-vCPU queue on the host side.
    
    It is now safe to increase the maximum number of queues.
    Preceding patch: 'net: allow large number of rx queues'
    made sure this won't cause failures due to high order memory
    allocations. Increase it to 256: this is the max number of vCPUs
    KVM supports.
    
    Size of tun_struct changes from 8512 to 10496 after this patch. This keeps
    pages allocated for tun_struct before and after the patch to 3.
    Signed-off-by: default avatarPankaj Gupta <pagupta@redhat.com>
    Reviewed-by: default avatarDavid Gibson <dgibson@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    baf71c5c
tun.c 55.7 KB