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    SubjectRe: [PATCH -mm 4/9] netconsole: Introduce netconsole_netdev_notifier
    Hi Satyam,

    > [4/9] netconsole: Introduce netconsole_netdev_notifier
    > To update fields of underlying netpoll structure at runtime on
    > corresponding NETDEV_CHANGEADDR or NETDEV_CHANGENAME notifications.
    > Signed-off-by: Satyam Sharma <>
    > Cc: Keiichi Kii <>
    > Cc: Takayoshi Kochi <>

    Should we avoid the automatic update of netconsole_target until we can notice all
    necessary members of netconsole_target updated automatically?

    I had thought about automatic updating of the netconsole_target(i.e. local IP address
    and network device).
    But I thought that the netconsole(netpoll) can only be related to a network device
    because the user of netconsole is free to be able to set local IP address and
    MAC address of netconsole and it is difficult to monitor change of local IP address.
    So, my patches only updates the network device automatically by using a symbolic link
    to the network device in sysfs when the event of NETDEV_CHANGEADDR occurs.
    The symbolic link to the network device in sysfs has the same meaning as following change
    of MAC address and hardware.
    (but I hadn't known the changing ability of MAC address using ip(8) command,
    thanks for your info)

    Or I propose updating netconsole_taget informations when the network device up/down.
    The MAC address and network interface name can be changed when
    the network device is disabled.
    But, in the case, we must think of the case of changing IP address
    because we can change IP address without disabling the network device and
    can't hook the event of changing IP address.

    How do you think?

    Keiichi KII
    NEC Corporation OSS Platform Development Division

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