[#5341] access to NFS root fs hangs after some time

Submitted By: Peter Meerwald

Open Date

2009-07-12 15:55:00

Priority:

Low Assignee:

Nobody

Status:

Open Fixed In Release:

N/A

Found In Release:

snaps Release:

Category:

Kernel Functions Board:

Custom

Processor:

BF537 Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Assigned (Not Start)

Uboot version or rev.:

Toolchain version or rev.:

SVN rev. 6972

App binary format:

N/A

Summary: access to NFS root fs hangs after some time

Details:

after some time of normal operation, access to the root filesystem mounted via NFS hangs (no kernel messages, no exception) and network interface seems to be unresponsive

kernel and processes seem to continue running

problem can be circumnavigated by specifying rsize=1024,wsize=1024 on the kernel boot command line

Follow-ups

--- Mike Frysinger 2009-07-12 16:04:33

please fully describe your system. you didnt say kernel/uclinux-dist version,

nor how exactly you're mounting your nfs root.

as the documentation explains, you need to make sure to be using TCP and at

least version 3.

--- Peter Meerwald 2009-07-12 16:21:39

kernel and uclinux-dist are SVN current (rev. 6972, rev. 8484)

kernel boot parameters are (with rsize/wsize added, so working):

setenv bootargs root=/dev/nfs rw

nfsroot=192.168.233.53:/romfs,tcp,nfsvers=3,rsize=1024,wsize=1024

ip=192.168.233.221:192.168.233.53:192.168.233.1:255.255.255.0:et908:eth0:off

earlyprintk=serial,uart0,115200 console=ttyBF0,115200

so NFSv3 and TCP should be used correctly

this is a custom board with a KS8993 ethernet switch chip in front of the EMAC,

so it could be that the KS8993 somehow dies after a while (I have not yet

checked against a vanilla bf537-stamp)

I have tried to build the kernel with and without size optimization (compare

with bug #5286), it makes no difference here

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