netdev - Re: [PATCH] bonding: Fix corrupted queue

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Date:	Fri, 8 Jun 2012 08:04:02 -0700
From:	Tom Herbert <therbert@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] bonding: Fix corrupted queue_mapping

> I must say I dont understand dev_pick_tx() anymore.
>
> It seems to ignore skb->queue_mapping (unless device provides its own
> ndo_select_queue() and this functions is aware of skb->queue_mapping, as
> correctly done in ixgbe)
>
> So commit fff3269907897ee (tcp: reflect SYN queue_mapping into SYNACK
> packets) works on ixgbe, but probably not on other multiqueue devices.
>
> This sounds like a regression to me.
>
Maybe the fundamental issue is that the queue mappings only allow for
one level of multi queue device.  It might be better if bonding didn't
have one and dev_pick_tx did the right thin (use xps on bonding
maybe).

Tom

>
>
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