netdev - Re: [PATCH net-next] liquidio: Prioritize control messages

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Message-Id: <20180329.141421.203457478188915829.davem@davemloft.net>
Date:   Thu, 29 Mar 2018 14:14:21 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     felix.manlunas@...ium.com
Cc:     netdev@...r.kernel.org, raghu.vatsavayi@...ium.com,
        derek.chickles@...ium.com, satananda.burla@...ium.com,
        intiyaz.basha@...ium.com
Subject: Re: [PATCH net-next] liquidio: Prioritize control messages

From: Felix Manlunas <felix.manlunas@...ium.com>
Date: Tue, 27 Mar 2018 19:25:18 -0700

> From: Intiyaz Basha <intiyaz.basha@...ium.com>
> 
> During heavy tx traffic, control messages (sent by liquidio driver to NIC
> firmware) sometimes do not get processed in a timely manner.  Reason is:
> the low-level metadata of control messages and that of egress network
> packets indicate that they have the same priority.
> 
> Fix it by setting a higher priority for control messages through the new
> ctrl_qpg field in the oct_txpciq struct.  It is the NIC firmware that does
> the actual setting of priority by writing to the new ctrl_qpg field; the
> host driver treats that value as opaque and just assigns it to pki_ih3->qpg
> 
> Signed-off-by: Intiyaz Basha <intiyaz.basha@...ium.com>
> Signed-off-by: Felix Manlunas <felix.manlunas@...ium.com>

Applied.