Re: rhashtable: Use __vmalloc with GFP_ATOMIC for table allocation

Herbert Xu
2015-12-09T02:38:55Z

On Wed, Dec 09, 2015 at 03:36:32AM +0100, Thomas Graf wrote:
>
> Without knowing your exact implementation plans: introducing an
> additional reference indirection for every lookup will have a
> huge performance penalty as well.
>
> Is your plan to only introduce the master table after an
> allocation has failed?

Right, obviously the extra indirections would only come into play
after a failed allocation. As soon as we can run the worker thread
it'll try to remove the extra indirections by doing vmalloc.

Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
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