netdev - Re: [PATCH 06/18] rhashtable: simplify nested_table_alloc() and rht_bucket_nested

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Message-ID: <20180601162859.g3xwnpri3scprgfj@gondor.apana.org.au>
Date:   Sat, 2 Jun 2018 00:28:59 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     NeilBrown <neilb@...e.com>
Cc:     Thomas Graf <tgraf@...g.ch>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/18] rhashtable: simplify nested_table_alloc() and
 rht_bucket_nested_insert()

On Fri, Jun 01, 2018 at 02:44:09PM +1000, NeilBrown wrote:
> Now that we don't use the hash value or shift in nested_table_alloc()
> there is room for simplification.
> We only need to pass a "is this a leaf" flag to nested_table_alloc(),
> and don't need to track as much information in
> rht_bucket_nested_insert().
> 
> Note there is another minor cleanup in nested_table_alloc() here.
> The number of elements in a page of "union nested_tables" is most naturally
> 
>   PAGE_SIZE / sizeof(ntbl[0])
> 
> The previous code had
> 
>   PAGE_SIZE / sizeof(ntbl[0].bucket)
> 
> which happens to be the correct value only because the bucket uses all
> the space in the union.
> 
> Signed-off-by: NeilBrown <neilb@...e.com>

Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
-- 
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