Re: [RFC][PATCH 7/7] kref: Implement using refcount_t

From: Peter Zijlstra
Date: Fri Nov 18 2016 - 13:54:03 EST

On Fri, Nov 18, 2016 at 04:58:52PM +0000, Reshetova, Elena wrote:
> > Could you please fix you mailer to not unwrap the emails?
> I wish I understand what you mean by "unwrap"... ?

Where I always have lines wrapped at 78 characters, but often when I see
them back in your reply, they're unwrapped and go on forever.

For some reason your mailer reflows text and mucks with whitespace. I
know Outlook likes to do this by default.

> On Fri, Nov 18, 2016 at 10:47:40AM +0000, Reshetova, Elena wrote:

> > Oh, and if we define refcount_t to be just atomic_t underneath, what
> > about the other atomic_long_t, local_t and atomic64_t cases when it is
> > used for recounting? I don't feel good just simply changing them to
> > become atomic_t under refcount_t wrapper.....
> > Is there anybody using local_t ? That seems 'creative' and highly questionable.
> I am not yet sure about refcounts, but local_t itself is used in couple of places.

Sure, there's local_t usage, but I'd be very surprised if there's a
single refcount usage among them.

> >As for atomic_long_t there's very few, I'd leave them be for now,

> Ok, I have started a list on them to keep track, but we need to do
> them also. There is no reason for them not to be refcounts, since so
> far the ones I see are classical refcounts.

Well, if you get to tools (cocci script or whatever) to reliably work
fork atomic_t, then converting the few atomic_long_t's later should be