Re: [RFC 3/4] tuntap: reduce the size of tun_struct by using flex array

David Gibson
2014-08-25T01:35:07Z

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On Mon, 18 Aug 2014 19:07:19 +0530
Pankaj Gupta <pagupta@redhat.com> wrote:

> This patch switches to flex array to implement the flow caches, it brings
> several advantages:
>
> - Reduce the size of the tun_struct structure, which allows us to increase the
> upper limit of queues in future.
> - Avoid higher order memory allocation. It will be useful when switching to
> pure hashing in flow cache which may demand a larger size array in future.
>
> After this patch, the size of tun_struct on x86_64 reduced from 8512 to
> 328
>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> Signed-off-by: Pankaj Gupta <pagupta@redhat.com>

Reviewed-by: David Gibson <dgibson@redhat.com>

--
David Gibson <dgibson@redhat.com>

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