[linux-cifs-client] CIFS VFS: Send error in read = -12

[Günter Kukkukk]

Am Donnerstag, 5. Juni 2008 schrieb Noah Romer:
> Günter Kukkukk wrote:
> > you can also use a network sniffer like wireshark and using "a ring 
> > buffer with multiple files" - so your sniffs aren't getting to large.
> > Doing so on the client might also change the timings, so you probably
> > won't catch the issue.
> >   
> Yeah, I considered using a packet sniffer, but haven't due to the timing 
> issue.

Writing cifs debug level 7 messages might influence the timings much more
than sniffing the traffic! 
So I would _always_ give it a try.
Beside those sniffs, setting cifsFYI to 1 might already catch enough
info about your issue.

> > If your network environment allows, you can also use a third machine
> > running wireshark in promiscous mode, which won't interfere with
> > the timings on the two other machines.
> >   
> 
> Unfortunately, the machines in question are located on-site in a 
> customer's data center. The only machine I have access to is the Linux 
> machine that's the client side of the conversation. I'm going to have to 
> step things back, verify that I can reproduce the issue with no 
> debugging again and then see if I can figure out a way to get more data 
> out of the connection.
> 
Cheers, Günter