linux-kernel - Re: [PATCH v2] netlink: Replace rhash

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Message-ID: <20150924034116.GC26853@htj.duckdns.org>
Date:	Wed, 23 Sep 2015 23:41:16 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	David Miller <davem@...emloft.net>, cwang@...pensource.com,
	tom@...bertland.com, kafai@...com, kernel-team@...com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	torvalds@...ux-foundation.org, jiri@...nulli.us,
	nicolas.dichtel@...nd.com, tgraf@...g.ch, sfeldma@...il.com
Subject: Re: [PATCH v2] netlink: Replace rhash_portid with bound

On Thu, Sep 24, 2015 at 11:31:17AM +0800, Herbert Xu wrote:
> No this isn't what happened.  My error was trying to see if there
> is a way to do it without barriers.  In the end there wasn't.  This
> has nothing to do with using primitives.

Hmmm... yeah, you can say that, but it still was a failure to
recognize and apply the common pattern and what you're suggesting is
deviating for no good reason.  It demands a lot of cognitive overhead
for something which should be routine and makes the code a lot more
fragile as a result.  Things like this make barrier usages difficult
to understand and verify because it takes away a lot of ready-made
cognitive tools.  So, let's please stick to the known pattern.

Thanks.

-- 
tejun
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