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From: Alexander Duyck <alexander.h.duyck@intel.com>
To: Ben Hutchings <bhutchings@solarflare.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net,
	jeffrey.t.kirsher@intel.com, edumazet@google.com,
	therbert@google.com, alexander.duyck@gmail.com
Subject: Re: [RFC PATCH 07/10] ixgbe: Add function for setting XPS queue mapping
Date: Wed, 11 Jul 2012 14:12:57 -0700	[thread overview]
Message-ID: <4FFDEC59.9040303@intel.com> (raw)
In-Reply-To: <1342030507.2613.46.camel@bwh-desktop.uk.solarflarecom.com>

On 07/11/2012 11:15 AM, Ben Hutchings wrote:
> On Fri, 2012-06-29 at 17:16 -0700, Alexander Duyck wrote:
>> This change adds support for ixgbe to configure the XPS queue mapping on
>> load.  The result of this change is that on open we will now be resetting
>> the number of Tx queues, and then setting the default configuration for XPS
>> based on if ATR is enabled or disabled.
> [...]
>
> I didn't see where you're resetting the number of TX queues; was that
> actually added in an earlier patch?
>
> It seems strange to be resetting XPS configuration on open; normally net
> device configuration persists as long as the device is registered.
> Maybe only do this if the number of TX queues has to change?
>
> Ben.
>
Actually I am working on top of a set of patches for ixgbe that haven't
been submitted upstream.  In one of those patches I moved our call to
netif_set_real_num_tx_queues into ixgbe_open.  The call is only one or
two lines above the call I make to ixgbe_set_xps_mapping.

I will see what I can do about resetting the settings only when we
change the number of queues.

Thanks,

Alex

  reply	other threads:[~2012-07-11 21:12 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-30  0:16 [RFC PATCH 00/10] Make XPS usable within ixgbe Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 01/10] net: Split core bits of dev_pick_tx into __dev_pick_tx Alexander Duyck
2012-07-07  0:03   ` Ben Hutchings
     [not found]     ` <CAL1qit_mpmVYQ3D4HQsii5LJ+Nu5=ftFWAWVnfPiDbmW5eWa0Q@mail.gmail.com>
2012-08-02 15:45       ` Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 02/10] net: Add functions netif_reset_xps_queue and netif_set_xps_queue Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 03/10] net: Rewrite netif_reset_xps_queue to allow for better code reuse Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 04/10] net: Rewrite netif_set_xps_queues to address several issues Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 05/10] net: Add support for XPS without SYSFS being defined Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 06/10] ixgbe: Define FCoE and Flow director limits much sooner to allow for changes Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 07/10] ixgbe: Add function for setting XPS queue mapping Alexander Duyck
2012-07-11 18:15   ` Ben Hutchings
2012-07-11 21:12     ` Alexander Duyck [this message]
2012-06-30  0:16 ` [RFC PATCH 08/10] ixgbe: Update ixgbe driver to use __dev_pick_tx in ixgbe_select_queue Alexander Duyck
2012-06-30  0:16 ` [RFC PATCH 09/10] ixgbe: Add support for displaying the number of Tx/Rx channels Alexander Duyck
2012-07-11 18:21   ` Ben Hutchings
2012-07-11 21:00     ` Alexander Duyck
2012-06-30  0:17 ` [RFC PATCH 10/10] ixgbe: Add support for set_channels ethtool operation Alexander Duyck
2012-07-03 22:30 ` [RFC PATCH 00/10] Make XPS usable within ixgbe Tom Herbert
2012-07-03 22:41   ` John Fastabend

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