Date: Sat, 27 Feb 2010 22:53:00 +0100 From: Willem Jan Withagen <wjw@digiware.nl> To: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> Cc: freebsd-fs@freebsd.org, stable@freebsd.org, =?ISO-8859-1?Q?=FChn?= <gerrit@pmp.uni-hannover.de>, Jeremy Chadwick <freebsd@jdc.parodius.com>, =?ISO-8859-1?Q?Gerrit_K?= Subject: Re: mbuf leakage with nfs/zfs? Message-ID: <4B89943C.70704@digiware.nl> In-Reply-To: <BD8AC9F6-DF96-41F9-8E92-48A4E5606DC7@anduin.net> References: <20100226141754.86ae5a3f.gerrit@pmp.uni-hannover.de> <E1Nl1mb-0002Mx-M9@kabab.cs.huji.ac.il> <E1Nl2JK-00033U-Fw@kabab.cs.huji.ac.il> <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>
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On 27-2-2010 21:32, Eirik Øverby wrote: > I've had a discussion with some folks on this for a while. I can easily > reproduce this situation by mounting a FreeBSD ZFS filesystem via > NFS-UDP from an OpenBSD machine. Telling the OpenBSD machine to use TCP > instead of UDP makes the problem go away. > > Other FreeBSD systems mounting the same share, either using UDP or TCP, > does not cause the problem to show up. > > A patch was suggested by Rick Macklem, but that did not solve the issue: > http://lists.freebsd.org/pipermail/freebsd-current/2009-December/014181.html I concur. Everything in my network is now on TCP, and there is no mbuf leakage. I just don't get over the 5500 mark, no matter what I throw at it. I do feel that TCP is not as well performing on a local net with Linux, hence the choice for UDP. But TCP is workable as next best. --WjW
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