linux-kernel - Re: [PATCH 01/13] seqnum_ops: Introduce Sequence Number Ops

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Date:   Thu, 12 Nov 2020 17:45:53 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Kees Cook <keescook@...omium.org>, corbet@....net,
        peterz@...radead.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] seqnum_ops: Introduce Sequence Number Ops

On Thu, Nov 12, 2020 at 09:17:27AM -0700, Shuah Khan wrote:
> On 11/12/20 5:36 AM, Matthew Wilcox wrote:
> > On Wed, Nov 11, 2020 at 12:23:03PM -0700, Shuah Khan wrote:
> > > > Agreed: this is a clear wrapping sequence counter. It's only abuse would
> > > > be using it in a place where wrapping actually is _not_ safe. (bikeshed:
> > > > can we call it wrap_u32 and wrap_u64?)
> > > 
> > > Still like seqnum_ops.
> > > 
> > > There is seqcount_t in seqlock.h which is a totally different feature.
> > 
> > Yes, and that's why this new thing, whatever it is called should not
> > have the word "sequence" in it.  People will get it confused.
> 
> Any suggestions for name. I am bad with coming up with names. How does
> Statcnt API and struct statcnt along the lines of your name suggestions
> in your previous email?

What does "stat" mean here?

And I don't understand the hesitation about "sequence" in a name, as
that's exactly what this is.  seqlock is different, yes.

How about "seqnum_t"?  That's what we call the sequence number that we
export to uevents, a "SEQNUM".

thanks,

greg k-h