linux-kernel - Re: rhashtable: Prevent spurious EBUSY errors on insertion

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Message-ID: <20151218022654.GA18495@gondor.apana.org.au>
Date:	Fri, 18 Dec 2015 10:26:54 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Xin Long <lucien.xin@...il.com>
Cc:	Phil Sutter <phil@....cc>, davem <davem@...emloft.net>,
	network dev <netdev@...r.kernel.org>,
	linux-kernel@...r.kernel.org, tgraf@...g.ch,
	fengguang.wu@...el.com, wfg@...ux.intel.com, lkp@...org
Subject: Re: rhashtable: Prevent spurious EBUSY errors on insertion

On Fri, Dec 18, 2015 at 12:07:08AM +0800, Xin Long wrote:
>
> I'm just wondering, why do not we handle the genuine double rehash
> issue inside rhashtable? i mean it's just a temporary error that a
> simple retry may fix it.

Because a double rehash means that someone has cracked your hash
function and there is no point in trying anymore.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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