Date: Wed, 24 Jun 2020 16:18:17 +0000 From: bugzilla-noreply@freebsd.org To: transport@FreeBSD.org Subject: [Bug 243590] TCP ECN not adhering extremely strictly to RFC3168 can cause massive TCP perf issues Message-ID: <bug-243590-38102-DFD1NaECWx@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-243590-38102@https.bugs.freebsd.org/bugzilla/> References: <bug-243590-38102@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243590 --- Comment #4 from commit-hook@freebsd.org --- A commit references this bug: Author: rscheff Date: Wed Jun 24 16:17:59 UTC 2020 New revision: 362586 URL: https://svnweb.freebsd.org/changeset/base/362586 Log: MFC r361347: With RFC3168 ECN, CWR SHOULD only be sent with new data Overly conservative data receivers may ignore the CWR flag on other packets, and keep ECE latched. This can result in continous reduction of the congestion window, and very poor performance when ECN is enabled. PR: 243590 Reviewed by: rgrimes (mentor), rrs Approved by: rgrimes (mentor, blanket) MFC after: 3 weeks Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D23364 Changes: _U stable/12/ stable/12/sys/netinet/tcp_input.c stable/12/sys/netinet/tcp_output.c stable/12/sys/netinet/tcp_stacks/rack.c --=20 You are receiving this mail because: You are on the CC list for the bug.=
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