• Dan Collins's avatar
    packet: Fixed TPACKET V3 to signal poll when block is closed rather than every packet · da413eec
    Dan Collins authored
    Make TPACKET_V3 signal poll when block is closed rather than for every
    packet. Side effect is that poll will be signaled when block retire
    timer expires which didn't previously happen. Issue was visible when
    sending packets at a very low frequency such that all blocks are retired
    before packets are received by TPACKET_V3. This caused avoidable packet
    loss. The fix ensures that the signal is sent when blocks are closed
    which covers the normal path where the block is filled as well as the
    path where the timer expires. The case where a block is filled without
    moving to the next block (ie. all blocks are full) will still cause poll
    to be signaled.
    Signed-off-by: default avatarDan Collins <dan@dcollins.co.nz>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
af_packet.c 96.8 KB