Data corruption with checksum offloading enabled

[Arno J. Klaassen]

Dmitry Marakasov <amdmi3 at amdmi3.ru> writes:

> * Arno J. Klaassen (arno at heho.snv.jussieu.fr) wrote:
>
> I had no problems since my previous message, however I've just noticed
> that rxcsum is disabled by default on 8.x. So this should really be
> tested after explicitely enabling it with ifconfig +rxcsum.

if ever this helps, I just came accross these messages on a
(7-stable) nfs-client against my 8-stable server which passes
the test : 

 Oct  3 17:25:05 push kernel: nfs_getpages: error 1433597680
 Oct  3 17:25:05 push kernel: vm_fault: pager read error, pid 26821 (cmp)
 Oct  3 17:28:25 push kernel: nfs_getpages: error 1435664464
 Oct  3 17:28:25 push kernel: vm_fault: pager read error, pid 27017 (cp)

IMHO looks like some rare nfs-miss-communication which passes silently
against a 7-nfssrver but gets noticed (and corrected ..) against a
8-nfsserver

/disclaimer it is late (here) and I need sleep

Arno