[Devel] Re: [PATCH 4/5] NFS: remove RPC PipeFS mount point reference from blocklayout routines

[Trond Myklebust]

On Tue, 2011-11-29 at 11:42 -0500, J. Bruce Fields wrote: 
> On Tue, Nov 29, 2011 at 11:40:30AM -0500, Trond Myklebust wrote:
> > I mean that I'm perfectly entitled to do
> > 
> > 'modprobe -r blocklayoutdriver'
> > 
> > and when I do that, then I expect blkmapd to close the rpc pipe and wait
> > for a new one to be created just like rpc.idmapd and rpc.gssd do when I
> > remove the nfs and sunrpc modules.
> 
> The rpc pipefs mount doesn't hold a reference on the sunrpc module?

I stand corrected: the mount does hold a reference to the sunrpc
module. 
However nothing holds a reference to the blocklayoutdriver module, so
the main point that the "blocklayout" pipe can disappear from underneath
the blkmapd stands.

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust at netapp.com
www.netapp.com