From owner-svn-src-head@freebsd.org Wed Jun 15 21:08:52 2016 Return-Path: Delivered-To: svn-src-head@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 E4846A47BCD; Wed, 15 Jun 2016 21:08:52 +0000 (UTC) (envelope-from jhb@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 8F69D1B09; Wed, 15 Jun 2016 21:08:52 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u5FL8pYk012175; Wed, 15 Jun 2016 21:08:51 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u5FL8pcO012174; Wed, 15 Jun 2016 21:08:51 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201606152108.u5FL8pcO012174@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Wed, 15 Jun 2016 21:08:51 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r301932 - head/sys/dev/cxgbe/tom X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Jun 2016 21:08:53 -0000 Author: jhb Date: Wed Jun 15 21:08:51 2016 New Revision: 301932 URL: https://svnweb.freebsd.org/changeset/base/301932 Log: Use sbused() instead of sbspace() to avoid signed issues. Inserting a full mbuf with an external cluster into the socket buffer resulted in sbspace() returning -MLEN. However, since sb_hiwat is unsigned, the -MLEN value was converted to unsigned in comparisons. As a result, the socket buffer was never autosized. Note that sb_lowat is signed to permit direct comparisons with sbspace(), but sb_hiwat is unsigned. Follow suit with what tcp_output() does and compare the value of sbused() with sb_hiwat instead. Approved by: re (gjb) Sponsored by: Chelsio Communications Modified: head/sys/dev/cxgbe/tom/t4_cpl_io.c Modified: head/sys/dev/cxgbe/tom/t4_cpl_io.c ============================================================================== --- head/sys/dev/cxgbe/tom/t4_cpl_io.c Wed Jun 15 21:01:53 2016 (r301931) +++ head/sys/dev/cxgbe/tom/t4_cpl_io.c Wed Jun 15 21:08:51 2016 (r301932) @@ -577,7 +577,7 @@ t4_push_frames(struct adapter *sc, struc struct tcpcb *tp = intotcpcb(inp); struct socket *so = inp->inp_socket; struct sockbuf *sb = &so->so_snd; - int tx_credits, shove, compl, space, sowwakeup; + int tx_credits, shove, compl, sowwakeup; struct ofld_tx_sdesc *txsd = &toep->txsd[toep->txsd_pidx]; INP_WLOCK_ASSERT(inp); @@ -652,9 +652,7 @@ t4_push_frames(struct adapter *sc, struc } } - space = sbspace(sb); - - if (space <= sb->sb_hiwat * 3 / 8 && + if (sbused(sb) > sb->sb_hiwat * 5 / 8 && toep->plen_nocompl + plen >= sb->sb_hiwat / 4) compl = 1; else @@ -663,7 +661,7 @@ t4_push_frames(struct adapter *sc, struc if (sb->sb_flags & SB_AUTOSIZE && V_tcp_do_autosndbuf && sb->sb_hiwat < V_tcp_autosndbuf_max && - space < sb->sb_hiwat / 8) { + sbused(sb) >= sb->sb_hiwat * 7 / 8) { int newsize = min(sb->sb_hiwat + V_tcp_autosndbuf_inc, V_tcp_autosndbuf_max);