netdev - Re: [PATCH net 2/2] rhashtable: remove indirection for grow/shrink decision functions

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Message-ID: <54EDEE55.8050605@iogearbox.net>
Date:	Wed, 25 Feb 2015 16:46:29 +0100
From:	Daniel Borkmann <daniel@...earbox.net>
To:	David Laight <David.Laight@...LAB.COM>,
	"davem@...emloft.net" <davem@...emloft.net>
CC:	"tgraf@...g.ch" <tgraf@...g.ch>,
	"pablo@...filter.org" <pablo@...filter.org>,
	"johunt@...mai.com" <johunt@...mai.com>,
	"kaber@...sh.net" <kaber@...sh.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net 2/2] rhashtable: remove indirection for grow/shrink
 decision functions

On 02/25/2015 04:41 PM, David Laight wrote:
...
> Why not cache the 'number of items before we need to expand' value
> after each expansion, setting it to 'infinite' when expansion is disabled.
> Then the above check is a simple comparison.
> You probably don't even need an atomic_read() - provided something is
> double checked once the first test determines that an expansion is needed.

Did you read my cover letter? ;)
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