linux-kernel - Re: [PATCH 0/2 v2] dcache: get/release read lock in read_seqbegin_or

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Message-ID: <5231FB85.7070206@hp.com>
Date:	Thu, 12 Sep 2013 13:36:05 -0400
From:	Waiman Long <waiman.long@...com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Alexander Viro <viro@...iv.linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>
Subject: Re: [PATCH 0/2 v2] dcache: get/release read lock in read_seqbegin_or_lock()
 & friend

On 09/12/2013 12:38 PM, Linus Torvalds wrote:
> On Thu, Sep 12, 2013 at 7:55 AM, Waiman Long<Waiman.Long@...com>  wrote:
>> Change log
>> ----------
>> v1->v2:
>>    - Rename the new seqlock primitives to read_seqexcl_lock* and
>>      read_seqexcl_unlock*.
> Applied. Except I peed in the snow and renamed the functions
> again.That whole "seqexcl" looked too odd to me. It not only looks a
> bit too much like random noise, but it makes it seem a whole different
> lock from the "seqlock" thing.
>
> I wanted to pattern the name after "write_seq[un]lock()", since it
> most resembles that (not just in implementation, but in usage: the
> traditional read-sequence isn't a lock, it's a begin/retry sequence,
> so the usage pattern is totally different too, and the naming is
> different).
>
> I ended up picking "read_seq[un]lock_excl()". I could have gone with
> "excl_" as a prefix too, I guess. Whatever. Now the "_excl" thing
> looks a bit like the "_bh"/"_irqX" context modifier, and I think it
> matches our normal lock naming pattern better.
>
>              Linus

I think your new names are better than mine. I am not good at naming 
stuff. Thank for the merge and the rename.

-Longman
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