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Re: NFS writes being corrupted?



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



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