netdev - RE: [PATCH V3 4/6] i40e: queue-specific settings for interrupt moderation

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Message-ID: <FC41C24E35F18A40888AACA1A36F3E418AFE59DA@fmsmsx115.amr.corp.intel.com>
Date:	Thu, 14 Jan 2016 22:41:41 +0000
From:	"Nelson, Shannon" <shannon.nelson@...el.com>
To:	"Liang, Kan" <kan.liang@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"bwh@...nel.org" <bwh@...nel.org>
CC:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
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	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"Wyborny, Carolyn" <carolyn.wyborny@...el.com>,
	"Skidmore, Donald C" <donald.c.skidmore@...el.com>,
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Subject: RE: [PATCH V3 4/6] i40e: queue-specific settings for interrupt
 moderation

> From: Kan Liang <kan.liang@...el.com>
> 
> For i40e driver, each vector has its own ITR register. However, there
> are no concept of queue-specific settings in the driver proper. Only
> global variable is used to store ITR values. That will cause problems
> especially when resetting the vector. The specific ITR values could be
> lost.
> This patch move rx_itr_setting and tx_itr_setting to i40e_ring to store
> specific ITR register for each queue.
> i40e_get_coalesce and i40e_set_coalesce are also modified accordingly to
> support queue-specific settings. To make it compatible with old ethtool,
> if user doesn't specify the queue number, i40e_get_coalesce will return
> queue 0's value. While i40e_set_coalesce will apply value to all queues.
> 
> Signed-off-by: Kan Liang <kan.liang@...el.com>
> ---
> 

Acked-by: Shannon Nelson <shannon.nelson@...el.com>