netdev - Re: [PATCH 3/3] NET: [SCHED] Qdisc changes and sch

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Message-ID: <4683EC23.2050705@trash.net>
Date:	Thu, 28 Jun 2007 19:13:07 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>
CC:	davem@...emloft.net, netdev@...r.kernel.org, jeff@...zik.org,
	auke-jan.h.kok@...el.com, hadi@...erus.ca
Subject: Re: [PATCH 3/3] NET: [SCHED] Qdisc changes and sch_rr added for multiqueue

PJ Waskiewicz wrote:
> +#ifdef CONFIG_NET_SCH_MULTIQUEUE
> +			if (q->mq)
> +				skb->queue_mapping = 
> +						q->prio2band[band&TC_PRIO_MAX];
> +			else
> +				skb->queue_mapping = 0;
> +#endif

Setting it to zero here is wrong, consider:

root qdisc: prio multiqueue
child qdisc: prio non-multiqueue

The top-level qdisc will set it, the child qdisc will unset it again.
When multiqueue is inactive it should not touch it.

I'll fix that as well.
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