[Bug 270636] Netmap leaks mbufs when receiving frames in generic mode on AMD Ryzen

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 04 Apr 2023 20:07:54 UTC

--- Comment #2 from koverskeid@gmail.com ---
(In reply to Mark Johnston from comment #1)
For testing purposes, I use a simple test application written in C which uses
poll and the function below.

void consume_packet(struct nm_desc* nmd)
    unsigned int ri;
    unsigned int while_iteration;
    char* buf;
    int i;
    for (ri = nmd->first_rx_ring; ri <= nmd->last_rx_ring; ri++) {
        struct netmap_ring* rxring;
        rxring = NETMAP_RXRING(nmd->nifp, ri);
        while (!nm_ring_empty(rxring)) {
            i = rxring->cur;
            buf = NETMAP_BUF(rxring, rxring->slot[i].buf_idx);
            rxring->cur = rxring->head = nm_ring_next(rxring, i);

I cannot see any console messages or log messages from netmap on the host.

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