Re: [patch] fs: scale vfsmount refcount (was Re: rcu-walk and dcache scaling tree update and status)

Nick Piggin
2010-12-16T02:27:30Z

On Wed, Dec 15, 2010 at 01:16:52AM -0700, Andreas Dilger wrote:
> On 2010-12-14, at 05:40, Nick Piggin wrote:
> > +static inline void add_mnt_count(struct vfsmount *mnt, int n)
> > +static inline void set_mnt_count(struct vfsmount *mnt, int n)
> > +static inline void inc_mnt_count(struct vfsmount *mnt)
> > +static inline void dec_mnt_count(struct vfsmount *mnt)
> > +unsigned int count_mnt_count(struct vfsmount *mnt)
>
> Minor nit - it is easier to find these related functions via tag
> completion if they are of the form "mnt_count_{add,set,inc,dec}"
> and it would also be more consistent and easier to understand if
> you rename count_mnt_count() to mnt_count_sum() or mnt_count_read().
>
> This also follows the kernel naming convention much more closely
> (e.g. atomic_{inc,dec,add,sub,set,read}(), mutex_{init,lock,unlock}(),
> etc), which is normally of the form {type}_{action}.

OK, I agree.

> Yes, I see the other {inc,dec,count}_mnt_writers() functions
> exist, but I'd prefer not to add more bad function names to
> the kernel. Maybe a separate patch to clean up those names is
> in order...

I might have added those too :P Yes they should be consistent, so
I'll rename them first.

Thanks,
Nick