Date: Sun, 24 May 2020 17:51:28 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 243590] TCP ECN not adhering extremely strictly to RFC3168 can cause massive TCP perf issues Message-ID: <bug-243590-7501-3JY0scemr6@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-243590-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-243590-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243590 --- Comment #1 from commit-hook@freebsd.org --- A commit references this bug: Author: rscheff Date: Sun May 24 17:51:14 UTC 2020 New revision: 361436 URL: https://svnweb.freebsd.org/changeset/base/361436 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. This does NOT contain the merge of the change to RACK since at this time that code does not exist in stable/11, and there is no plan to merge RACK to stable/11. PR: 243590 Reviewed by: rgrimes (mentor), rrs Approved by: rgrimes (mentor), tuexen (mentor) MFC after: 3 days Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D23364 Changes: _U stable/11/ stable/11/sys/netinet/tcp_input.c stable/11/sys/netinet/tcp_output.c --=20 You are receiving this mail because: You are the assignee for the bug.=
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