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

From: David Gibson
Date: Sun Aug 24 2014 - 21:35:35 EST

On Mon, 18 Aug 2014 19:07:19 +0530
Pankaj Gupta <pagupta@xxxxxxxxxx> 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@xxxxxxxxxx>
> Signed-off-by: Pankaj Gupta <pagupta@xxxxxxxxxx>

Reviewed-by: David Gibson <dgibson@xxxxxxxxxx>

David Gibson <dgibson@xxxxxxxxxx>

Attachment: pgpim1ofcgJml.pgp
Description: PGP signature