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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Rafal Kozik <rk@semihalf.com>, dev@dpdk.org
Cc: mw@semihalf.com, mk@semihalf.com, gtzalik@amazon.com,
	evgenys@amazon.com,  matua@amazon.com, igorch@amazon.com,
	thomas@monjalon.net
Subject: Re: [dpdk-dev] [PATCH v4 1/4] igb_uio: add wc option
Date: Fri, 29 Jun 2018 14:20:36 +0100	[thread overview]
Message-ID: <148bba87-27d5-9eac-6844-696e8f0d0a9a@intel.com> (raw)
In-Reply-To: <1530274637-10156-2-git-send-email-rk@semihalf.com>

On 6/29/2018 1:17 PM, Rafal Kozik wrote:
> From: Kozik <rk@semihalf.com>
> 
> Write combining (WC) increases NIC performance by making better
> utilization of PCI bus, but cannot be use by all PMD.
> 
> To get internal_addr memory need to be mapped. But as memory could not be
> mapped twice: with and without WC it should be skipped for WC. [1]
> 
> To do not spoil other drivers that potentially could use internal_addr,
> parameter wc_activate adds possibility to skip it for those PMDs,
> that do not use it.
> 
> [1] https://www.kernel.org/doc/ols/2008/ols2008v2-pages-135-144.pdf
> 	section 5.3 and 5.4
> 
> Signed-off-by: Rafal Kozik <rk@semihalf.com>
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

(I am still not able to confirm this is needed, but since the behavior change is
controlled by module param and internal_addr is not used at all, no need to
block the patch)

  parent reply	other threads:[~2018-06-29 13:20 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-11 14:07 [dpdk-dev] [PATCH 0/4] support for write combining Rafal Kozik
2018-04-11 14:07 ` [dpdk-dev] [PATCH 1/4] igb_uio: add wc option Rafal Kozik
2018-06-27 16:34   ` Ferruh Yigit
2018-06-28 13:08     ` Rafał Kozik
2018-06-28 13:15       ` [dpdk-dev] [PATCH v2 0/4] support for write combining Rafal Kozik
2018-06-28 13:15         ` [dpdk-dev] [PATCH v2 1/4] igb_uio: add wc option Rafal Kozik
2018-06-28 14:32           ` Ferruh Yigit
2018-06-29  8:35             ` Rafał Kozik
2018-06-29 10:08               ` Ferruh Yigit
2018-06-29 10:24           ` [dpdk-dev] [PATCH v3 0/4] support for write combining Rafal Kozik
2018-06-29 10:24             ` [dpdk-dev] [PATCH v3 1/4] igb_uio: add wc option Rafal Kozik
2018-06-29 10:53               ` Ferruh Yigit
2018-06-29 12:17               ` [dpdk-dev] [PATCH v4 0/4] Support for write combining Rafal Kozik
2018-06-29 12:17                 ` [dpdk-dev] [PATCH v4 1/4] igb_uio: add wc option Rafal Kozik
2018-06-29 13:11                   ` Rafał Kozik
2018-06-29 13:20                   ` Ferruh Yigit [this message]
2018-06-29 13:40                   ` Ferruh Yigit
2018-06-29 12:17                 ` [dpdk-dev] [PATCH v4 2/4] bus/pci: reference driver structure Rafal Kozik
2018-06-29 12:17                 ` [dpdk-dev] [PATCH v4 3/4] eal: enable WC during resources mapping Rafal Kozik
2018-06-29 12:17                 ` [dpdk-dev] [PATCH v4 4/4] net/ena: enable WC Rafal Kozik
2018-06-29 13:54               ` [dpdk-dev] [PATCH v5 0/4] Support for write combining Rafal Kozik
2018-06-29 13:54                 ` [dpdk-dev] [PATCH v5 1/4] igb_uio: add wc option Rafal Kozik
2018-06-29 13:54                 ` [dpdk-dev] [PATCH v5 2/4] bus/pci: reference driver structure Rafal Kozik
2018-06-29 13:54                 ` [dpdk-dev] [PATCH v5 3/4] eal: enable WC during resources mapping Rafal Kozik
2018-06-29 13:54                 ` [dpdk-dev] [PATCH v5 4/4] net/ena: enable WC Rafal Kozik
2018-06-29 14:26                 ` [dpdk-dev] [PATCH v5 0/4] Support for write combining Ferruh Yigit
2018-06-29 22:13                   ` Thomas Monjalon
2018-06-29 10:24             ` [dpdk-dev] [PATCH v3 2/4] bus/pci: reference driver structure Rafal Kozik
2018-06-29 10:24             ` [dpdk-dev] [PATCH v3 3/4] eal: enable WC during resources mapping Rafal Kozik
2018-06-29 10:24             ` [dpdk-dev] [PATCH v3 4/4] net/ena: enable WC Rafal Kozik
2018-06-28 13:15         ` [dpdk-dev] [PATCH v2 2/4] bus/pci: reference driver structure Rafal Kozik
2018-06-28 13:15         ` [dpdk-dev] [PATCH v2 3/4] eal: enable WC during resources mapping Rafal Kozik
2018-06-28 14:50           ` Ferruh Yigit
2018-06-29  8:58             ` Rafał Kozik
2018-06-29  9:05               ` Ferruh Yigit
2018-06-29 10:28                 ` Rafał Kozik
2018-06-29 10:37                   ` Ferruh Yigit
2018-06-28 13:15         ` [dpdk-dev] [PATCH v2 4/4] net/ena: enable WC Rafal Kozik
2018-07-02  6:52           ` Michał Krawczyk
2018-04-11 14:07 ` [dpdk-dev] [PATCH 2/4] bus/pci: reference driver structure Rafal Kozik
2018-06-27 16:36   ` Ferruh Yigit
2018-06-28 13:05     ` Rafał Kozik
2018-04-11 14:07 ` [dpdk-dev] [PATCH 3/4] eal: enable WC during resources mapping Rafal Kozik
2018-06-27 16:41   ` Ferruh Yigit
2018-06-28 13:06     ` Rafał Kozik
2018-04-11 14:07 ` [dpdk-dev] [PATCH 4/4] net/ena: enable WC Rafal Kozik
2018-06-27 16:11   ` Thomas Monjalon
2018-06-28 13:04     ` Rafał Kozik
2018-04-11 14:42 ` [dpdk-dev] [PATCH 0/4] support for write combining Bruce Richardson
2018-04-16 11:36   ` Rafał Kozik
2018-04-27  8:27     ` Rafał Kozik
2018-04-27 11:30       ` Bruce Richardson
2018-04-30  8:07         ` Rafał Kozik
2018-04-30  8:58           ` Bruce Richardson

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