From mboxrd@z Thu Jan  1 00:00:00 1970
From: Bruce Richardson <bruce.richardson@intel.com>
Subject: Re: [PATCH 0/4] support for write combining
Date: Fri, 27 Apr 2018 12:30:31 +0100
Message-ID: <20180427113030.GA101968@bricha3-MOBL.ger.corp.intel.com>
References: <1523455637-31719-1-git-send-email-rk@semihalf.com>
 <20180411144251.GA33124@bricha3-MOBL.ger.corp.intel.com>
 <CAMG3L492f=4XV+q__sZmGDv5TP=yho-hNu80VRdnwmyLh7q+zw@mail.gmail.com>
 <CAMG3L4_8wLFg0sE7i7c3QZYAVv6Chs-yt956kRjbWwUCGMo29w@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Cc: dev@dpdk.org, Marcin Wojtas <mw@semihalf.com>,
 =?utf-8?Q?Micha=C5=82?= Krawczyk <mk@semihalf.com>,
 "Tzalik, Guy" <gtzalik@amazon.com>, evgenys@amazon.com,
 "Matushevsky, Alexander" <matua@amazon.com>,
 "Chauskin, Igor" <igorch@amazon.com>, Ferruh Yigit <ferruh.yigit@intel.com>
To: =?utf-8?B?UmFmYcWC?= Kozik <rk@semihalf.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mga09.intel.com (mga09.intel.com [134.134.136.24])
 by dpdk.org (Postfix) with ESMTP id B35536CCC
 for <dev@dpdk.org>; Fri, 27 Apr 2018 13:30:37 +0200 (CEST)
Content-Disposition: inline
In-Reply-To: <CAMG3L4_8wLFg0sE7i7c3QZYAVv6Chs-yt956kRjbWwUCGMo29w@mail.gmail.com>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On Fri, Apr 27, 2018 at 10:27:02AM +0200, Rafał Kozik wrote:
> Hello Bruce,
> 
> As from my last post passed ten days I would kindly ask if there are
> any more comments?
> 
> Best regards,
> Rafal Kozik

Hi Rafal,

sorry for not responding before. The set makes a lot more sense to me now.
However, just one more question? If igb_uio is passed the flag to make
mappings wc, what happens if you have a mix of drivers that support or
don't support wc at the driver, not the hardware level. For example,
support there is one ena adapter and one i40e adapter. The hardware on both
should be mappable as WC, but one driver can use that, the other can't. How
is it handled?

/Bruce