Date: Fri, 16 May 2003 09:21:23 -0400 (EDT) From: Robert Watson <rwatson@FreeBSD.org> To: Kris Kennaway <kris@obsecurity.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/fxp if_fxp.c Message-ID: <Pine.NEB.3.96L.1030516092042.24024H-100000@fledge.watson.org> In-Reply-To: <20030516021956.GA8711@rot13.obsecurity.org>
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On Thu, 15 May 2003, Kris Kennaway wrote: > On Thu, May 15, 2003 at 06:13:17PM -0700, Robert Watson wrote: > > rwatson 2003/05/15 18:13:17 PDT > > > > FreeBSD src repository > > > > Modified files: > > sys/dev/fxp if_fxp.c > > Log: > > Add a tunable/sysctl "hw.fxp_noflow" which disables flow control support > > on if_fxp cards. When flow control is enabled, if the operating system > > doesn't acknowledge the packet buffer filling, the card will begin to > > generate ethernet quench packets, but appears to get into a feedback > > loop of some sort, hosing local switches. This is a temporary workaround > > for 5.1: the ability to configure flow control should probably be > > exposed by some or another management interface on ethernet link layer > > devices. > > Yay! This periodically hosed one of my 4.x boxes until I added a hack > from Peter to turn it off. Can this be back-ported at some point? I imagine it would be a trivial backport, if no one else gets to it in a day or two, I can do it this weekend. It could be the patch would even apply verbatim to RELENG_4 if the drivers are pretty in sync (which they may well be). Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Network Associates Laboratories
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