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Re: 2.6.xx: NFS: directory motion/cam2 contains a readdir loop

To: Bryan Schumaker <bjschuma@xxxxxxxxxx>
Subject: Re: 2.6.xx: NFS: directory motion/cam2 contains a readdir loop
From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Date: Wed, 27 Jul 2011 13:15:53 -0400 (EDT)
Cc: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
In-reply-to: <4E303F6F.8010706@xxxxxxxxxx>
References: <alpine.DEB.2.02.1107270952270.1451@xxxxxxxxxxxxxxxx> <20110727160752.GC974@xxxxxxxxxxxx> <alpine.DEB.2.02.1107271227340.1451@xxxxxxxxxxxxxxxx> <4E303F6F.8010706@xxxxxxxxxx>
User-agent: Alpine 2.02 (DEB 1266 2009-07-14)


On Wed, 27 Jul 2011, Bryan Schumaker wrote:

On 07/27/2011 12:28 PM, Justin Piszcz wrote:


On Wed, 27 Jul 2011, J. Bruce Fields wrote:

On Wed, Jul 27, 2011 at 09:54:09AM -0400, Justin Piszcz wrote:
Hi,

Kernel 2.6.30 on client.
Kernel 2.6.28 on server.

p34 kernel: [92223.918892] NFS: directory motion/cam2 contains a
readdir loop.  Please contact your server vendor.  Offending cookie: 10272

What filesystem on the server are you exporting?

Hi,

xfs.
/dev/sda1 on / type xfs (rw,noatime)

Nothing special, thoughts?

Are there a lot of files in the directory you're exporting?  It looks like 
cookie 10272 is mapped to multiple files. When the client tries to resume 
reading from this cookie, xfs will reply from the first matching file and cause 
the client to enter a loop.

Should I be using a different filesystem?

user@atom:/d1$ cd /d1/motion/cam1
user@atom:/d1/motion/cam1$ ls|wc
   5198    5198  140346
user@atom:/d1/motion/cam1$

Justin.


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