From owner-svn-src-stable@freebsd.org Fri Dec 30 01:59:20 2016 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 76ACDC974A1; Fri, 30 Dec 2016 01:59:20 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 511DB13AB; Fri, 30 Dec 2016 01:59:20 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id uBU1xJHQ021392; Fri, 30 Dec 2016 01:59:19 GMT (envelope-from sephe@FreeBSD.org) Received: (from sephe@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id uBU1xJJn021389; Fri, 30 Dec 2016 01:59:19 GMT (envelope-from sephe@FreeBSD.org) Message-Id: <201612300159.uBU1xJJn021389@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sephe set sender to sephe@FreeBSD.org using -f From: Sepherosa Ziehau Date: Fri, 30 Dec 2016 01:59:19 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r310799 - in stable/10/sys: conf dev/hyperv/netvsc modules/hyperv/netvsc X-SVN-Group: stable-10 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Dec 2016 01:59:20 -0000 Author: sephe Date: Fri Dec 30 01:59:19 2016 New Revision: 310799 URL: https://svnweb.freebsd.org/changeset/base/310799 Log: MFC 309346,309348 309346 hyperv/hn: Add HN_DEBUG kernel option. If bufring is used for per-TX ring descs, don't update "available" counter, which is only used to help debugging. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8674 309348 hyperv/hn: Don't hold txdesc, if no BPFs are attached. Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8675 Modified: stable/10/sys/conf/options stable/10/sys/dev/hyperv/netvsc/if_hn.c stable/10/sys/modules/hyperv/netvsc/Makefile Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/conf/options ============================================================================== --- stable/10/sys/conf/options Fri Dec 30 01:34:06 2016 (r310798) +++ stable/10/sys/conf/options Fri Dec 30 01:59:19 2016 (r310799) @@ -947,3 +947,6 @@ RANDOM_RWFILE opt_random.h # Intel em(4) driver EM_MULTIQUEUE opt_em.h + +# Hyper-V network driver +HN_DEBUG opt_hn.h Modified: stable/10/sys/dev/hyperv/netvsc/if_hn.c ============================================================================== --- stable/10/sys/dev/hyperv/netvsc/if_hn.c Fri Dec 30 01:34:06 2016 (r310798) +++ stable/10/sys/dev/hyperv/netvsc/if_hn.c Fri Dec 30 01:59:19 2016 (r310799) @@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$"); #include "opt_inet6.h" #include "opt_inet.h" +#include "opt_hn.h" #include #include @@ -1436,10 +1437,12 @@ hn_txdesc_put(struct hn_tx_ring *txr, st txr->hn_txdesc_avail++; SLIST_INSERT_HEAD(&txr->hn_txlist, txd, link); mtx_unlock_spin(&txr->hn_txlist_spin); -#else +#else /* HN_USE_TXDESC_BUFRING */ +#ifdef HN_DEBUG atomic_add_int(&txr->hn_txdesc_avail, 1); - buf_ring_enqueue(txr->hn_txdesc_br, txd); #endif + buf_ring_enqueue(txr->hn_txdesc_br, txd); +#endif /* !HN_USE_TXDESC_BUFRING */ return 1; } @@ -1465,8 +1468,10 @@ hn_txdesc_get(struct hn_tx_ring *txr) if (txd != NULL) { #ifdef HN_USE_TXDESC_BUFRING +#ifdef HN_DEBUG atomic_subtract_int(&txr->hn_txdesc_avail, 1); #endif +#endif /* HN_USE_TXDESC_BUFRING */ KASSERT(txd->m == NULL && txd->refs == 0 && STAILQ_EMPTY(&txd->agg_list) && txd->chim_index == HN_NVS_CHIM_IDX_INVALID && @@ -1933,17 +1938,20 @@ done: static int hn_txpkt(struct ifnet *ifp, struct hn_tx_ring *txr, struct hn_txdesc *txd) { - int error, send_failed = 0; + int error, send_failed = 0, has_bpf; again: - /* - * Make sure that this txd and any aggregated txds are not freed - * before ETHER_BPF_MTAP. - */ - hn_txdesc_hold(txd); + has_bpf = bpf_peers_present(ifp->if_bpf); + if (has_bpf) { + /* + * Make sure that this txd and any aggregated txds are not + * freed before ETHER_BPF_MTAP. + */ + hn_txdesc_hold(txd); + } error = txr->hn_sendpkt(txr, txd); if (!error) { - if (bpf_peers_present(ifp->if_bpf)) { + if (has_bpf) { const struct hn_txdesc *tmp_txd; ETHER_BPF_MTAP(ifp, txd->m); @@ -1966,7 +1974,8 @@ again: txr->hn_pkts += txr->hn_stat_pkts; txr->hn_sends++; } - hn_txdesc_put(txr, txd); + if (has_bpf) + hn_txdesc_put(txr, txd); if (__predict_false(error)) { int freed; @@ -3479,9 +3488,11 @@ hn_tx_ring_create(struct hn_softc *sc, i if (txr->hn_tx_sysctl_tree != NULL) { child = SYSCTL_CHILDREN(txr->hn_tx_sysctl_tree); +#ifdef HN_DEBUG SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_avail", CTLFLAG_RD, &txr->hn_txdesc_avail, 0, "# of available TX descs"); +#endif #ifdef HN_IFSTART_SUPPORT if (!hn_use_if_start) #endif Modified: stable/10/sys/modules/hyperv/netvsc/Makefile ============================================================================== --- stable/10/sys/modules/hyperv/netvsc/Makefile Fri Dec 30 01:34:06 2016 (r310798) +++ stable/10/sys/modules/hyperv/netvsc/Makefile Fri Dec 30 01:59:19 2016 (r310799) @@ -5,7 +5,7 @@ KMOD= hv_netvsc SRCS= hn_nvs.c hn_rndis.c if_hn.c -SRCS+= bus_if.h device_if.h opt_inet.h opt_inet6.h vmbus_if.h +SRCS+= bus_if.h device_if.h opt_inet.h opt_inet6.h vmbus_if.h opt_hn.h CFLAGS+= -I${.CURDIR}/../../../dev/hyperv/netvsc