Re: [nfs, rpc] crap with refcounting and rmmod races

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On Wed, Jun 22, 2011 at 08:12:40PM +0100, Al Viro wrote:

> 	Note that extra references to vfsmount do not prevent umount from
> removing the sucker from the tree and dropping the preexisting reference
> to it.  umount -l will do that just fine.
> 
> 	This thing is called as ->rpc_release(); do we have anything
> protecting the issuer of rpc_run_task() from being rmmod'ed before (or
> during) the call of ->rpc_release()?

While we are at it, is ->rpc_release() allowed to trigger rpc_shutdown_client()
on out ->tk_client?
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