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hyperv/hn: Add tunable to allow tcp_lro_queue_mbuf()

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MFC after:	1 week
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6841
This commit is contained in:
Sepherosa Ziehau 2016-07-11 06:23:01 +00:00
parent c1cc5bdfe8
commit 57bb267df3
1 changed files with 22 additions and 2 deletions

24
sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c

@ -299,6 +299,12 @@ static int hn_tx_swq_depth = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_swq_depth, CTLFLAG_RDTUN,
&hn_tx_swq_depth, 0, "Depth of IFQ or BUFRING");
#if __FreeBSD_version >= 1100095
static u_int hn_lro_mbufq_depth = 0;
SYSCTL_UINT(_hw_hn, OID_AUTO, lro_mbufq_depth, CTLFLAG_RDTUN,
&hn_lro_mbufq_depth, 0, "Depth of LRO mbuf queue");
#endif
static u_int hn_cpu_index;
/*
@ -1283,6 +1289,19 @@ hv_m_append(struct mbuf *m0, int len, c_caddr_t cp)
return (remainder == 0);
}
#if defined(INET) || defined(INET6)
static __inline int
hn_lro_rx(struct lro_ctrl *lc, struct mbuf *m)
{
#if __FreeBSD_version >= 1100095
if (hn_lro_mbufq_depth) {
tcp_lro_queue_mbuf(lc, m);
return 0;
}
#endif
return tcp_lro_rx(lc, m, 0);
}
#endif
/*
* Called when we receive a data packet from the "wire" on the
@ -1488,7 +1507,7 @@ skip:
if (lro->lro_cnt) {
rxr->hn_lro_tried++;
if (tcp_lro_rx(lro, m_new, 0) == 0) {
if (hn_lro_rx(lro, m_new) == 0) {
/* DONE! */
return 0;
}
@ -2223,7 +2242,8 @@ hn_create_rx_data(struct hn_softc *sc, int ring_cnt)
*/
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
tcp_lro_init_args(&rxr->hn_lro, sc->hn_ifp, lroent_cnt, 0);
tcp_lro_init_args(&rxr->hn_lro, sc->hn_ifp, lroent_cnt,
hn_lro_mbufq_depth);
#else
tcp_lro_init(&rxr->hn_lro);
rxr->hn_lro.ifp = sc->hn_ifp;