DPDK patches and discussions
 help / color / Atom feed
From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Fang TongHao <fangtonghao@sangfor.com.cn>,
	thomas@monjalon.net, arybchenko@solarflare.com
Cc: dev@dpdk.org, stable@dpdk.org, jia.guo@intel.com,
	cunming.liang@intel.com, qi.z.zhang@intel.com,
	jungle845943968@outlook.com
Subject: Re: [dpdk-dev] [PATCH v2] Fixes: ethdev: secondary process change shared memory
Date: Tue, 14 Jan 2020 14:45:33 +0000
Message-ID: <3c3022b0-aa8d-1404-0a6c-21a86ab6f9d7@intel.com> (raw)
In-Reply-To: <20200113050312.1506-1-fangtonghao@sangfor.com.cn>

On 1/13/2020 5:03 AM, Fang TongHao wrote:
> Secondary process calls “rte_eth_dev_pci_allocate”
> function and enters rte_eth_copy_pci_info function
> when initializing.Then it sets the value of struct
> "rte_eth_dev_data.dev_flags" to zero and reset it,
> but this struct is shared by primary process and
> secondary process.To fix this bug,by adding an
> if-statement to forbid the secondaryprocess changing
> the above-mentioned value.

Hi Fang,

Thanks for the fix, I agree with the problem statement, but not sure if this
should be handled in the helper function or in the place where the function is
called. Helper function is simple on what it does, do we need to put the primary
process logic in it.

Can you please give more details of the bug you have encounter, is it seen by a
specific PMD?

Thanks,
ferruh

> 
> Signed-off-by: Fang TongHao <fangtonghao@sangfor.com.cn>
> ---
>  lib/librte_ethdev/rte_ethdev_pci.h | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h
> index ccdbb46ec..e7dae0545 100644
> --- a/lib/librte_ethdev/rte_ethdev_pci.h
> +++ b/lib/librte_ethdev/rte_ethdev_pci.h
> @@ -60,14 +60,16 @@ rte_eth_copy_pci_info(struct rte_eth_dev *eth_dev,
>  
>  	eth_dev->intr_handle = &pci_dev->intr_handle;
>  
> -	eth_dev->data->dev_flags = 0;
> -	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
> -		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
> -	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
> -		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
> -
> -	eth_dev->data->kdrv = pci_dev->kdrv;
> -	eth_dev->data->numa_node = pci_dev->device.numa_node;
> +	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
> +		eth_dev->data->dev_flags = 0;
> +		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
> +			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
> +		if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_RMV)
> +			eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_RMV;
> +
> +		eth_dev->data->kdrv = pci_dev->kdrv;
> +		eth_dev->data->numa_node = pci_dev->device.numa_node;
> +	}
>  }
>  
>  static inline int
> 


  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-09 12:27 [dpdk-dev] [PATCH] ethdev: fix secondary process change share memory Fang TongHao
2020-01-10  7:30 ` Jeff Guo
2020-01-10  7:53   ` 方统浩50450
2020-01-13  5:03 ` [dpdk-dev] [PATCH v2] Fixes: ethdev: secondary process change shared memory Fang TongHao
2020-01-14 14:45   ` Ferruh Yigit [this message]
2020-01-15  6:49     ` 方统浩50450
2020-01-15 18:35       ` Ferruh Yigit
2020-01-15 20:43         ` Thomas Monjalon
2020-01-16  7:43           ` Andrew Rybchenko
2020-01-16  9:04             ` Ferruh Yigit
2020-01-16 11:35               ` 方统浩50450
2020-01-16 12:18                 ` Ferruh Yigit
2020-01-17  2:11                   ` 方统浩50450
2020-01-16  9:00           ` Ferruh Yigit
2020-01-17  2:08   ` [dpdk-dev] [PATCH v3] " Fang TongHao
2020-01-17  8:33     ` Andrew Rybchenko
2020-01-17 17:58       ` Ferruh Yigit

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=3c3022b0-aa8d-1404-0a6c-21a86ab6f9d7@intel.com \
    --to=ferruh.yigit@intel.com \
    --cc=arybchenko@solarflare.com \
    --cc=cunming.liang@intel.com \
    --cc=dev@dpdk.org \
    --cc=fangtonghao@sangfor.com.cn \
    --cc=jia.guo@intel.com \
    --cc=jungle845943968@outlook.com \
    --cc=qi.z.zhang@intel.com \
    --cc=stable@dpdk.org \
    --cc=thomas@monjalon.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ http://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev


Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/ public-inbox