Re: [PATCH take 2] net_sched: Add qdisc __NET_XMIT_BYPASS flag
From: Jarek Poplawski <hidden>
Date: 2008-08-04 21:03:59
On Mon, Aug 04, 2008 at 09:35:35PM +0300, Jussi Kivilinna wrote:
Quoting "Jarek Poplawski" [off-list ref]:quoted
These 2 patches aren't supposed to fix these problems: - the __NET_XMIT_STOLEN patch fixes a problem when a qdiscs passed upwards NET_XMIT_SUCCESS when eg. an skb was stolen by an action, to prevent treating this as dropped; then the upper qdiscs couldn't tell it's not the full NET_XMIT_SUCCESS and counted it as queued, which was wrong. (BTW, I especially tried to do it with minimal changes in htb_enqueue() to let you apply your htb patch without much editing.) - the __NET_XMIT_BYPASS actually doesn't fix any serious problem, but lets to remove the mapping from dev_queue_xmit(), and BTW it passes better information to upper qdiscs too.This seems to also make sure that when returning 'full' NET_XMIT_SUCCESS, skb pointer is safe(r?) to use now.
I guess so... At least theoretically - I was mainly afraid of redirecting, which isn't fully implemented yet. On the other hand, outwards of qdiscs there is still no difference. Jarek P.