Hello, could you please let me know any ideas? Thank you, Kind regards, Bao On Sat, 23 Sept 2023 at 12:12, Naruto Nguyen <narutonguyen2018@gmail.com> wrote:
Hello everyone,
Recently I found that packets sent from vmxnet3 driver on guest have MSS value set to very small size, some 10 bytes, some 25 bytes MSS. The vmxnet3 NIC enables TSO. Could you let me know any possible reason that the packets are fragmented with very small MSS.and is it normal?. Any way to avoid this small MSS or it's just normal.
In addition, when enabling debug for vmxnet3, in function vmxnet3_tq_xmit, it has a printout
netdev_dbg(adapter->netdev, "txd[%u]: SOP 0x%Lx 0x%x 0x%x\n", (u32)(ctx.sop_txd - tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr), le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
could you suggest an easier way to extract the MSS value from this output?
Thanks, Kind regards, Naruto