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From: Jerin Jacob <jerinjacobk@gmail.com>
To: Rasesh Mody <rmody@marvell.com>
Cc: Thomas Monjalon <thomas@monjalon.net>,
	Ferruh Yigit <ferruh.yigit@intel.com>, dpdk-dev <dev@dpdk.org>,
	 Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	GR-Everest-DPDK-Dev <GR-Everest-DPDK-Dev@marvell.com>,
	 Igor Russkikh <irusskikh@marvell.com>,
	Andrew Rybchenko <arybchenko@solarflare.com>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH 2/2] net/qede: restore Tx queue setup
Date: Sun, 10 May 2020 12:34:25 +0530
Message-ID: <CALBAE1PYYwwi4kSeaVo8MegugNDttGJo1ykzzo9sthQM3PUaxQ@mail.gmail.com> (raw)
In-Reply-To: <BYAPR18MB2838855101EF89E820BD6C29B5A40@BYAPR18MB2838.namprd18.prod.outlook.com>

On Wed, May 6, 2020 at 8:13 AM Rasesh Mody <rmody@marvell.com> wrote:
>
> Hi,
>
> >From: Thomas Monjalon <thomas@monjalon.net>
> >Sent: Tuesday, May 05, 2020 2:15 AM
> >
> >05/05/2020 10:59, Ferruh Yigit:
> >> On 5/5/2020 7:44 AM, Jerin Jacob wrote:
> >> > On Tue, May 5, 2020 at 8:39 AM Rasesh Mody <rmody@marvell.com>
> >wrote:
> >> >>
> >> >> Some applications do not explicitly restore Tx queues setup during
> >> >> port re-configuration. This patch adds changes to check for
> >> >> released Tx queues and restore the setup if application doesn't
> >> >> explicitly does that.
> >> >
> >> > +ethdev maintainers.
> >> >
> >> > I think, Ideally, the fix should be in common code if we need to
> >> > support such applications.
> >>
> >> Is this a case application re-configures to increase the number of
> >> queues but doesn't setup new queues?
> >> If so this looks like application error and application should be
> >> fixed instead of recover this in the ethdev.
> >
> >+1
> >
>
> This is a case of KNI application performing device re-configuration to change MTU. The application explicitly calls Rx queue setup, however doesn't call Tx queue setup. When MTU for KNI interface is changed it runs into a segfault when trying to start Tx queues.

Can we fix the KNI application then?

> Some other applications make use of rte_eth_dev_set_mtu() ethdev op, which looks to be cleaner approach.
>
> Thanks!
> -Rasesh
>

  reply	other threads:[~2020-05-10  7:04 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05  3:09 [dpdk-dev] [PATCH 1/2] net/qede: fix assignment of Rx/Tx handlers Rasesh Mody
2020-05-05  3:09 ` [dpdk-dev] [PATCH 2/2] net/qede: restore Tx queue setup Rasesh Mody
2020-05-05  6:44   ` Jerin Jacob
2020-05-05  8:59     ` Ferruh Yigit
2020-05-05  9:15       ` Thomas Monjalon
2020-05-06  2:43         ` [dpdk-dev] [EXT] " Rasesh Mody
2020-05-10  7:04           ` Jerin Jacob [this message]
2020-05-14  4:10             ` Rasesh Mody
2020-05-14  7:56               ` Jerin Jacob
2020-05-14 14:32           ` Ferruh Yigit
2020-05-14 22:43             ` Rasesh Mody
2020-05-15 10:39               ` Ferruh Yigit
2020-05-05  9:01 ` [dpdk-dev] [PATCH 1/2] net/qede: fix assignment of Rx/Tx handlers Ferruh Yigit
2020-05-06  2:34   ` [dpdk-dev] [EXT] " Rasesh Mody
2020-05-14  4:09 ` [dpdk-dev] [PATCH v2 " Rasesh Mody
2020-05-14  4:09 ` [dpdk-dev] [PATCH v2 2/2] examples/kni: fix MTU change to setup Tx queue Rasesh Mody
2020-05-14 15:33   ` Ferruh Yigit
2020-05-15 11:29   ` Ferruh Yigit
2020-05-19 16:31     ` Thomas Monjalon
2020-05-15  6:34 ` [dpdk-dev] [PATCH v3 1/2] net/qede: fix assignment of Rx/Tx handlers Rasesh Mody
2020-05-15 12:26   ` Jerin Jacob
2020-05-15  6:34 ` [dpdk-dev] [PATCH v3 2/2] net/qede: fix port reconfiguration Rasesh Mody

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