netdev - Re: [RFC] iproute2, ifindex option

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Date:	Wed, 20 Jul 2011 08:58:42 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	<netdev@...r.kernel.org>
Subject: Re: [RFC] iproute2, ifindex option

On Wed, 20 Jul 2011 18:54:44 +0300
Denys Fedoryshchenko <denys@...p.net.lb> wrote:

>  On Wed, 20 Jul 2011 08:37:53 -0700, Stephen Hemminger wrote:
> >
> > If caching is a problem, I would rather just get rid of the cache 
> > altogether.
> > There are a number of other places where it is a problem as well.
>  It is good, but it must be controlled. Also people put some efforts to 
>  improve it...
>  Before i did custom patch to "trash" the cache, but after cache 
>  improved i should rewrite it. If required, i can make cache behavior 
>  changeable (on,off,flush ?).
>  Will it help for you too?
> 
>  I think ifindex is good anyway, because sometimes it is better to refer 
>  to specific ppp interface by ifindex.

The problem is that it is not possible to make a "safe" cache since
it is possible for network device names to be changed at any time.
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