Date: Fri, 8 Jan 2010 16:48:04 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: =?utf-8?B?RWlyaWsgw5h2ZXJieQ==?= <ltning@anduin.net> Cc: pyunyh@gmail.com, weldon@excelsusphoto.com, freebsd-current@freebsd.org, "Robert N. M. Watson" <rwatson@freebsd.org>, Gavin Atkinson <gavin@freebsd.org> Subject: Re: FreeBSD 8.0 - network stack crashes? Message-ID: <Pine.GSO.4.63.1001081642560.24198@muncher.cs.uoguelph.ca> In-Reply-To: <43D0E400-183E-4741-9ABD-14ED80D90983@anduin.net> References: <A1648B95-F36D-459D-BBC4-FFCA63FC1E4C@anduin.net> <20091129013026.GA1355@michelle.cdnetworks.com> <74BFE523-4BB3-4748-98BA-71FBD9829CD5@anduin.net> <alpine.BSF.2.00.0911291427240.80654@fledge.watson.org> <34AD565D-814A-446A-B9CA-AC16DD762E1B@anduin.net> <A0C9ED20-5536-44E2-B26B-0F1AEC2AF79C@anduin.net> <BA47FDA1-1097-4C43-AF71-51E7227795B5@FreeBSD.org> <1DFC4992-E136-4674-BC0E-A6B1DAE12AF4@anduin.net> <EE2AA268-2309-4924-A3AD-1EC256E7BB2A@freebsd.org> <E8883290-0D35-44AC-9ED9-8464C4F7FF62@anduin.net> <3BC13C71-348A-49AD-94BA-FC28EB0648DE@freebsd.org> <43D0E400-183E-4741-9ABD-14ED80D90983@anduin.net>
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On Fri, 8 Jan 2010, Eirik =C3~Xverby wrote:
>
> On 8. jan. 2010, at 16.33, Robert N. M. Watson wrote:
>> On 30 Nov 2009, at 19:13, Eirik =D8verby wrote:
>>
>>> I meant NFS-UDP ... However I was wrong even there; Using NFS over UDP =
from FreeBSD boxes does not cause the same issue. So OpenBSD seems to be a =
special case here.
>>>
As a data point, I tried to reproduce it here using an OpenBSD4.5 client=20
and wasn't able to see a leak. So it might be only certain versions of
OpenBSD or certain network configs or ??? (I used NFSv3 over UDP.)
I doubt it, but if the version of OpenBSD you were using happened to
use NFSv2 by default with UDP vs NFSv3 for TCP, there is a patch that
fixes an mbuf leak, that is specific to NFSv2. However, if you were
using NFSv3 over UDP, then this won't be relevant.
I can look at a packet trace, but I kinda doubt that it's going to
shed light on the cause of the mbuf leak.
("tcpdump -s 0 -w <file> host <server>" should get a packet capture
that Wireshark will make sense of.)
rick
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