Date: Sun, 28 Feb 2010 18:55:46 +0100 From: Gerrit =?ISO-8859-1?Q?K=FChn?= <gerrit@pmp.uni-hannover.de> To: "Robert N. M. Watson" <rwatson@freebsd.org> Cc: stable@freebsd.org, freebsd-fs@freebsd.org, Willem Jan Withagen <wjw@digiware.nl>, Eirik =?ISO-8859-1?Q?=D8verby?= <ltning@anduin.net>, Daniel Braniss <danny@cs.huji.ac.il>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: mbuf leakage with nfs Message-ID: <20100228185546.f9fefa97.gerrit@pmp.uni-hannover.de> In-Reply-To: <F794BAF9-4ADC-48F8-ACC3-C441EF77A8F2@freebsd.org> References: <20100226174021.8feadad9.gerrit@pmp.uni-hannover.de> <E1Nl6VA-000557-D9@kabab.cs.huji.ac.il> <20100226224320.8c4259bf.gerrit@pmp.uni-hannover.de> <4B884757.9040001@digiware.nl> <20100227080220.ac6a2e4d.gerrit@pmp.uni-hannover.de> <4B892918.4080701@digiware.nl> <20100227202105.f31cbef7.gerrit@pmp.uni-hannover.de> <20100227193819.GA60576@icarus.home.lan> <BD8AC9F6-DF96-41F9-8E92-48A4E5606DC7@anduin.net> <4B89943C.70704@digiware.nl> <20100227220310.GA65110@icarus.home.lan> <E1Nlhzr-0004ci-3W@kabab.cs.huji.ac.il> <F794BAF9-4ADC-48F8-ACC3-C441EF77A8F2@freebsd.org>
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On Sun, 28 Feb 2010 12:21:28 +0000 "Robert N. M. Watson" <rwatson@freebsd.org> wrote about Re: mbuf leakage with nfs/zfs? : RNMW> It's almost certainly one or a small number of very specific RPCs RNMW> that are triggering it -- maybe OpenBSD does an extra lookup, or RNMW> stat, or something, on a name that may not exist anymore, or does it RNMW> sooner than the other clients. Hard to say, other than to wave hands RNMW> at the possibilities. RNMW> RNMW> And it may well be we're looking at two bugs: Danny may see one bug, RNMW> perhaps triggered by a race condition, but it may be different from RNMW> the OpenBSD client-triggered bug (to be clear: it's definitely a RNMW> FreeBSD bug, although we might only see it when an OpenBSD client is RNMW> used because perhaps OpenBSD also has a bug or feature). In my case it is the Linux client causing the problems (cannot tell yet if it is only with udp, but I would think so). If I understand Daniel correctly his latest testes were performed with FreeBSD client and udp. So it may very well be a generel issue with udp?! Would this help narrowing down the problem? cu Gerrit
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