Hello!

> Please see atached files for details on the oops, kernel config, and
> other infos from /proc dir as well as dmesg output.

Please, look at net/ipv4/tcp_timer.c, function tcp_delack_timer().
It should look as:

void tcp_delack_timer(unsigned long data)
{
        struct sock *sk = (struct sock*)data;

        if(!sk->zapped &&
           sk->tp_pinfo.af_tcp.delayed_acks &&
           sk->state != TCP_CLOSE) {
                /* If socket is currently locked, defer the ACK. */
                if (!atomic_read(&sk->sock_readers))
                        tcp_send_ack(sk);
                else
                        tcp_send_delayed_ack(&(sk->tp_pinfo.af_tcp), HZ/10);
        }
}

Is it true?

Alexey Kuznetsov
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