Re: 2.6.31-rc8: CIFS with 5 seconds hiccups

On Wed, 9 Sep 2009, Jeff Layton wrote:

> That'll stop your client from requesting oplocks, but that won't
> prevent others from doing so. If my suspicion is correct, then another
> client is holding an oplock and the server needs to break it before it
> can reply to yours.
>
> Unfortunately I doubt there's much you can do from your client to
> prevent that (if that is the case). There may be a way to turn off
> oplocks on the server side, but that may very well be even worse for
> performance.

Hmmm... We can look at that.

Another interesting tidbit is that I have never seen this from a 64 bit
Linux kernel. Only occurs with 32 bit kernels it seems.