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Message-ID: <20141117044657.GA30723@gondor.apana.org.au> Date: Mon, 17 Nov 2014 12:46:58 +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 On Sat, Nov 15, 2014 at 06:37:26PM -0800, Josh Triplett wrote: > On November 15, 2014 6:22:27 PM PST, Herbert Xu <herbert@...dor.apana.org.au> wrote: > >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? > > No, since each pass just handles one set of nodes from each bucket anyway, you can just do a bit more work in the rehasher instead. OK let me see if I could implement something like that in rhashtable. Thanks, -- 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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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