Date: Thu, 12 Dec 2002 11:23:10 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Garrett Wollman <wollman@lcs.mit.edu> Cc: Nate Lawson <nate@root.org>, current@FreeBSD.ORG Subject: Re: if_fxp and pause packets (or, "I didn't need the network anyway") Message-ID: <20021212192310.GA8113@rot13.obsecurity.org> In-Reply-To: <200212121704.gBCH4DiF010233@khavrinen.lcs.mit.edu> References: <Pine.NEB.3.96L.1021211215617.2056C-100000@fledge.watson.org> <Pine.BSF.4.21.0212112308070.32698-100000@root.org> <200212121704.gBCH4DiF010233@khavrinen.lcs.mit.edu>
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[-- Attachment #1 --] On Thu, Dec 12, 2002 at 12:04:13PM -0500, Garrett Wollman wrote: > <<On Wed, 11 Dec 2002 23:09:46 -0800 (PST), Nate Lawson <nate@root.org> said: > > > I've noticed this too with fxp. It only happens while in ddb and I > > thought it was my fault (I was debugging some networking problems). > > It happens when the NIC's receive queue fills up. When you're in DDB, > the kernel is not answering network interrupts. One of my machines has an fxp that likes to do this while the machine is still up -- perhaps it's just a manifestation of 5.0's higher interrupt latency. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE9+OIdWry0BWjoQKURAg87AJ9e3+RcyHVSaTn+fbxBknrmKuHWHwCgy45/ 3rlcFWQ2mvKD2GqKZF57mUM= =5eSu -----END PGP SIGNATURE-----help
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