Date: Fri, 20 Apr 2018 15:41:33 +0000 (UTC) From: "Jonathan T. Looney" <jtl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r332828 - stable/11/sys/netinet Message-ID: <201804201541.w3KFfXTK096731@repo.freebsd.org>
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Author: jtl Date: Fri Apr 20 15:41:33 2018 New Revision: 332828 URL: https://svnweb.freebsd.org/changeset/base/332828 Log: MFC r306768: If the new window size is less than the old window size, skip the calculations to check if we should advertise a larger window. Modified: stable/11/sys/netinet/tcp_output.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/tcp_output.c ============================================================================== --- stable/11/sys/netinet/tcp_output.c Fri Apr 20 15:35:58 2018 (r332827) +++ stable/11/sys/netinet/tcp_output.c Fri Apr 20 15:41:33 2018 (r332828) @@ -677,10 +677,11 @@ after_sack_rexmit: oldwin = 0; /* - * If the new window size ends up being the same as the old - * size when it is scaled, then don't force a window update. + * If the new window size ends up being the same as or less + * than the old size when it is scaled, then don't force + * a window update. */ - if (oldwin >> tp->rcv_scale == (adv + oldwin) >> tp->rcv_scale) + if (oldwin >> tp->rcv_scale >= (adv + oldwin) >> tp->rcv_scale) goto dontupdate; if (adv >= (long)(2 * tp->t_maxseg) &&
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