On 6/2/08, Ralph Campbell <[EMAIL PROTECTED]> wrote: > > On Mon, 2008-06-02 at 20:52 +0300, Olga Shern (Voltaire) wrote: > > > > > > On 6/2/08, Ralph Campbell <[EMAIL PROTECTED]> wrote: > > What do you mean by "block loopback"? > > Does this mean a posted send WR for a multicast packet > > that matches the local LID is not sent at all or > > the packet is sent on the wire but not sent to > > the local QP? Or is it something else? > > > > > > It controls the ConnectX HCA multicast packets block loopback > > (blck_lb) for self QP. The patch is designed to enable or > > > > disable blocking of all multicast packets on self QP created on the > > ConnectX HCA > > I understand that the patch enables/disables the bit. > You didn't really answer my question which is what does > the bit really do. I'm pretty sure it means that multicast > packets aren't forwarded to any locally attached QPs > but I wanted to be sure that is what it does. > > No, It isn't disabled for every QP (by default loopback is enabled), when you attach QP to multicast group you can decide to disable it (the decision is done per QP)
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