Re: NFS writes being corrupted?

[Jeff Rizzo <riz%tastylime.net@localhost>]

On 8/4/15 4:20 AM, Robert Swindells wrote:
> David Holland wrote:
>
> > Does that size vary with the NFS block size?

Yep.  Reducing blocksize to 8192 makes it barf on 8192+ byte files.

> Also is it using UDP or TCP ?

TCP, but I just confirmed UDP has the problem too.

> > The symptoms make me think of scrambled mbufs, if anything...
> My guess is that the panics that wiz and I saw in the checksum code
> on amd64 were also due to scrambled mbufs.
>
> My cubietruck seems fine using awge(4), I have built a fair number of
> packages over NFS recently.
>
> Robert Swindells

Looks like awge(4) is seeing output errors:

Name  Mtu   Network       Address              Ipkts Ierrs    Opkts 
Oerrs Colls
awge0 1500  <Link>        00:1e:06:c3:49:c1   189582     0 134261   
222     0

Not sure of what variety, though.  The oerrs go up when reading a large 
file (90M) which checksums properly, but DON'T go up when 
writing/reading an 8k file which gets corrupted.

+j