DPDK patches and discussions
 help / color / Atom feed
From: "Yigit, Ferruh" <ferruh.yigit@linux.intel.com>
To: Matan Azrad <matan@mellanox.com>,
	dev@dpdk.org, Bernard Iremonger <bernard.iremonger@intel.com>
Cc: Gaetan Rivet <gaetan.rivet@6wind.com>,
	thomas@monjalon.net, stable@dpdk.org,
	David Marchand <david.marchand@redhat.com>,
	Jeff Guo <jia.guo@intel.com>, Qi Zhang <qi.z.zhang@intel.com>
Subject: Re: [dpdk-dev] [PATCH 2/2] app/testpmd: fix invalid port detaching
Date: Thu, 23 Jan 2020 13:19:31 +0000
Message-ID: <c9e8cae1-0984-fc26-5e9b-6d71619ddb1d@linux.intel.com> (raw)
In-Reply-To: <1573548459-6931-2-git-send-email-matan@mellanox.com>

On 11/12/2019 8:47 AM, Matan Azrad wrote:
> The port was not validated before detaching.
> 
> Ignore port detach operation when the port is not valid.
> 
> Fixes: f8e5baa2662d ("app/testpmd: check not detaching device twice")
> Cc: thomas@monjalon.net
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@mellanox.com>
> ---
>  app/test-pmd/testpmd.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index 4444346..370eefe 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -2545,6 +2545,9 @@ struct extmem_param {
>  
>  	printf("Removing a device...\n");
>  
> +	if (port_id_is_invalid(port_id, ENABLED_WARN))
> +		return;
> +
>  	dev = rte_eth_devices[port_id].device;
>  	if (dev == NULL) {
>  		printf("Device already removed\n");
> 

The patch is already in 19.11 [1] but it is breaking the testpmd hotplug support.

Before 'detach_port_device()' called, the port has been stopped and closed [2],
which will make port fail from 'port_id_is_invalid()' check and the device
removal path never fully called.
The implication is, since device not detached, vfio request interrupt keeps
triggered continuously and re-starts the detach path, but because of the half
cleaned device it fails and app gets stuck with a continuous log [3].

I wonder if the actual hotplug has been tested with this patch, the commit log
is not clear about the motivation and implication of the patch, I am not clear
why this check is added but I am sending a patch soon to remove it back.

Regards,
ferruh


[1]
https://git.dpdk.org/dpdk/commit/?id=43d0e304980a1527bcac92dc679057b189e2545a

[2]
rmv_port_callback
  stop_port(port_id);
  close_port(port_id);
  detach_port_device(port_id);

[3]
EAL: can not get port by device 0000:00:05.0!
EAL: can not get port by device 0000:00:05.0!
EAL: can not get port by device 0000:00:05.0!
EAL: can not get port by device 0000:00:05.0!
EAL: can not get port by device 0000:00:05.0!
EAL: can not get port by device 0000:00:05.0!
...

  parent reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-12  8:47 [dpdk-dev] [PATCH 1/2] bus/pci: fix driver detach clear Matan Azrad
2019-11-12  8:47 ` [dpdk-dev] [PATCH 2/2] app/testpmd: fix invalid port detaching Matan Azrad
2019-11-12 11:20   ` Iremonger, Bernard
2019-11-20 22:52     ` [dpdk-dev] [dpdk-stable] " David Marchand
2020-01-23 13:19   ` Yigit, Ferruh [this message]
2020-01-23 14:05     ` [dpdk-dev] " Matan Azrad
2020-01-23 14:48       ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2020-01-23 15:29         ` Matan Azrad
2020-01-23 18:14           ` Ferruh Yigit
2020-01-23 19:25             ` Matan Azrad
2020-01-24 16:28               ` Ferruh Yigit
2020-01-25 18:56                 ` Matan Azrad
2020-02-03 15:58                   ` Ferruh Yigit
2020-02-03 17:10                     ` Matan Azrad
2020-02-12 13:49                       ` Ferruh Yigit
2020-02-13 12:37                         ` Thomas Monjalon
2020-02-13 13:36                           ` Thomas Monjalon
2020-02-13 14:00                             ` Ferruh Yigit
2019-11-19 22:40 ` [dpdk-dev] [dpdk-stable] [PATCH 1/2] bus/pci: fix driver detach clear Thomas Monjalon
2019-11-20  9:02   ` Matan Azrad
2019-11-20  9:47 ` [dpdk-dev] [PATCH v2] " Matan Azrad
2019-11-20 13:03   ` [dpdk-dev] [dpdk-stable] " David Marchand
2019-11-20 13:44     ` Matan Azrad
2019-11-20 13:51     ` Thomas Monjalon
2019-11-20 17:22       ` David Marchand
2019-11-20 22:52   ` David Marchand

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=c9e8cae1-0984-fc26-5e9b-6d71619ddb1d@linux.intel.com \
    --to=ferruh.yigit@linux.intel.com \
    --cc=bernard.iremonger@intel.com \
    --cc=david.marchand@redhat.com \
    --cc=dev@dpdk.org \
    --cc=gaetan.rivet@6wind.com \
    --cc=jia.guo@intel.com \
    --cc=matan@mellanox.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