Subject: Re: regression: unregister_netdev() unusably slow

From: Benjamin LaHaise <[email-masked]>
Date: Sun, 24 May 2009 17:44:33 -0400

On Sun, May 24, 2009 at 11:42:17PM +0200, Eric Dumazet wrote:
> (But vlan case might be litle bit more expensive than your case, since we call
> synchronize_net() three times (once in unregister_vlan_dev(), and twice in rollback_registered()

I did try commenting out the synchronize_net() calls in rollback_registered(), 
but that had almost no effect on the rate of interface deletion.  50ms is 
still way too expensive.

		-ben