linux-kernel - Re: [PATCH 12/49] writeback: move backing_dev_info->bdi_stat[] into bdi

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Message-ID: <20150421150229.GA9455@htj.duckdns.org>
Date:	Tue, 21 Apr 2015 11:02:29 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Jan Kara <jack@...e.cz>
Cc:	axboe@...nel.dk, linux-kernel@...r.kernel.org, hch@...radead.org,
	hannes@...xchg.org, linux-fsdevel@...r.kernel.org,
	vgoyal@...hat.com, lizefan@...wei.com, cgroups@...r.kernel.org,
	linux-mm@...ck.org, mhocko@...e.cz, clm@...com,
	fengguang.wu@...el.com, david@...morbit.com, gthelen@...gle.com,
	Miklos Szeredi <miklos@...redi.hu>,
	Trond Myklebust <trond.myklebust@...marydata.com>
Subject: Re: [PATCH 12/49] writeback: move backing_dev_info->bdi_stat[] into
 bdi_writeback

On Tue, Apr 21, 2015 at 10:51:19AM +0200, Jan Kara wrote:
>   I can easily understand what "initializing writeback structure" means but
> "exiting writeback structure" doesn't really make sense to me. OTOH
> "destroying writeback structure" does make sense to me. That's the only
> reason.

We have enough cases where "exit" is used that way starting with
module_exit() and all the accompanying __exit annotations and there
are quite a few others.  I think it's enough to establish "exit" as
the counterpart of "init" but I do agree that it felt a bit alien to
me at the beginning too.

In general, I've been sticking with create/destroy if the object
itself is being created or destroyed and init/exit if the object
itself stays put across init/exit which is the case here.  This isn't
quite universal but I think there exists enough of a pattern to make
it worthwhile to stick to it.  As such, I'd like to stick to the
current names if it isn't a big deal.

Thanks.

-- 
tejun
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