On Tue, 12 Oct 2021 18:53:50 +0000 Biju Das wrote: > > > Yes, you are correct. Sergey, suggested use R-Car RX-HW checksum with > > > RCSC/RCPT and But the TOE gives either 0x0 or 0xffff as csum output > > > and feeding this value to skb->csum lead to kernel crash. > > > > That's quite concerning. Do you have any of the > > > > /proc/sys/kernel/panic_on_io_nmi > > /proc/sys/kernel/panic_on_oops > > /proc/sys/kernel/panic_on_rcu_stall > > /proc/sys/kernel/panic_on_unrecovered_nmi > > /proc/sys/kernel/panic_on_warn > > > > knobs set? I'm guessing we hit do_netdev_rx_csum_fault() when the checksum > > is incorrect, but I'm surprised that causes a panic. > > I tested this last week, if I remember correctly It was not panic, > rather do_netdev_rx_csum_fault. I will recheck and will send you the > stack trace next time. Ah, when you say crash you mean a stack trace appears. The machine does not crash? That's fine, we don't need to see the trace.
