[pnfs] [PATCH 9/9] pnfs client prevent race in sequence slot

[Trond Myklebust]

On Thu, 2007-09-27 at 14:29 -0700, Rahul Iyer wrote:
>   
> Wouldn't it be far simpler to tear down the session and re-create it? 
> That's what the new 2.6.23 sessions implementation does when it receives 
> anything that leads it to believe that it may be out of sync with the 
> server.

Simpler, yes, but it means that you can pretty much DOS the entire NFS
client by just starting I/O and then pressing ^C. Don't forget that you
can't do any I/O while tearing down the old session, and setting up the
new one.
It really would be nicer for performance to be able to recover the
single slot.

Trond