Re: problems with nfs+TCP - Resource temporarily unavailable

From: Bernd Walter <ticso_at_cicely12.cicely.de> Date: Thu, 26 May 2005 10:57:51 +0200 · This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:35 UTC

On Thu, May 26, 2005 at 01:03:25AM +0200, Oliver Lehmann wrote:
> ######
> 
> 
> I tried the same with an other nfs server (using dill as nfs server this
> time - system description is in my 1st mail, same mount options like /
> mnt/files). And guess what? dill rebooted immediate... dd came never
> back, gave no output
> 
> dill's dmesg shows me:
> 
> fatal kernel trap:
> 
>     trap entry     = 0x4 (unaligned access fault)
>     faulting va    = 0xfffffc0006b6f44d
>     opcode         = 0x28
>     register       = 0x5
>     pc             = 0xfffffc0000541e08
>     ra             = 0xfffffc0000541df4
>     sp             = 0xfffffe000a0f9b70
>     usp            = 0x11ffea80
>     curthread      = 0xfffffc000f91ee10
>         pid = 343, comm = nfsd

This is absolutely known - TCP/nfs has bugs in realigning packets.
Don't use TCP on strong aligned architectures.

-- 
B.Walter                   BWCT                http://www.bwct.de
bernd_at_bwct.de                                  info_at_bwct.de