netdev - Re: [PATCH 4/4] rhashtable: Add parent argument to mutex_is

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Message-ID: <20141116022227.GA24541@gondor.apana.org.au>
Date:	Sun, 16 Nov 2014 10:22:27 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	tgraf@...g.ch, netdev@...r.kernel.org, eric.dumazet@...il.com,
	paulmck@...ux.vnet.ibm.com
Subject: Re: [PATCH 4/4] rhashtable: Add parent argument to mutex_is_held

Josh Triplett <josh@...htriplett.org> wrote:
>
> - Set up the new empty table with the new set of hash parameters.
> - synchronize_rcu().  Readers will now search both old and new tables.
> - Peel nodes off the ends of the old hash table and add them to the new

We currently use a singly linked list in rhashtable.  Peeling nodes
off the end would mean upgrading to a doubly linked list, which is
no different than keeping two lists in terms of cache footprint, no?

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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