netdev - Re: Ottawa and slow hash-table resize

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Message-ID: <20150225085637.GB2982@gondor.apana.org.au>
Date:	Wed, 25 Feb 2015 21:56:37 +1300
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	josh@...htriplett.org, David Miller <davem@...emloft.net>,
	kaber@...sh.net, paulmck@...ux.vnet.ibm.com,
	alexei.starovoitov@...il.com, ying.xue@...driver.com,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: Ottawa and slow hash-table resize

On Tue, Feb 24, 2015 at 10:34:09PM +0000, Thomas Graf wrote:
>
> There is a side effect. We can't grow the number of bucket locks more
> than 2x if we grow the table itself faster than 2x. So if we start
> out with a table size of 512 and grow 4 times in a row we will end
> up with a theoretical max bucket locks of 4K. Probably enough though.

Does this limit on bucket locks apply to my rehash scheme?

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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