Date: Wed, 16 Jun 2004 15:28:50 GMT From: Mike Cambria <mcc@fid4.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/68013: tp->snd_wl1 & snd_wl2 are not updated in the header prediction cases Message-ID: <200406161528.i5GFSoU4026062@www.freebsd.org> Resent-Message-ID: <200406161530.i5GFUPX1049883@freefall.freebsd.org>
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>Number: 68013 >Category: kern >Synopsis: tp->snd_wl1 & snd_wl2 are not updated in the header prediction cases >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jun 16 15:30:24 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Mike Cambria >Release: 4.8 stable >Organization: >Environment: FreeBSD mcambria.fid4.com 4.8-STABLE FreeBSD 4.8-STABLE #0: Fri Dec 26 16:24:22 EST 2003 root@mcambria:/usr/obj/usr/src/sys/OPTI11 i386 >Description: In tcp_input.c, if we process enough data in the header prediction code -- where the step 6 never executes, and then somehow reach step 6. snd_wnd collapses and tcp_output stops sending. >How-To-Repeat: Transfer a very large file that stays in "steady state" so as to execute header prediction for a 2+ GB transfer. Then cause header prediction to exit (e.g. pull the cable on the receiving node briefly.) >Fix: I believe that snd_wl1 & snd_wl2 need to be updated in the header prediction cases as well. >Release-Note: >Audit-Trail: >Unformatted:
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