Re: [PATCH v2] fs/nfsd/nfs4callback: Remove deprecated create_singlethread_workqueue

[Tejun Heo]

Hello, Bruce.

On Tue, Nov 08, 2016 at 04:39:11PM -0500, J. Bruce Fields wrote:
> Apologies, just cleaning out old mail and finding some I should have
> responded to long ago:
> 
> On Wed, Aug 31, 2016 at 02:23:48AM +0530, Bhaktipriya Shridhar wrote:
> > The workqueue "callback_wq" queues a single work item &cb->cb_work per
> > nfsd4_callback instance and thus, it doesn't require execution ordering.
> 
> What's "execution ordering"?
> 
> We definitely do depend on the fact that at most one of these is running
> at a time.

If there can be multiple cb's and thus cb->cb_work's per callback_wq,
it'd need explicit ordering.  Is that the case?

Thanks.

-- 
tejun