From: Thomas Monjalon <thomas@monjalon.net>
To: David Marchand <david.marchand@redhat.com>,
Ferruh Yigit <ferruh.yigit@intel.com>
Cc: Matan Azrad <matan@mellanox.com>,
Shahaf Shuler <shahafs@mellanox.com>,
Viacheslav Ovsiienko <viacheslavo@mellanox.com>,
Jasvinder Singh <jasvinder.singh@intel.com>,
Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
Andrew Rybchenko <arybchenko@solarflare.com>, dev <dev@dpdk.org>,
dpdk stable <stable@dpdk.org>,
Raslan Darawsheh <rasland@mellanox.com>
Subject: Re: [dpdk-stable] [PATCH] ethdev: limit maximum number of queues
Date: Wed, 27 Nov 2019 15:11:11 +0100 [thread overview]
Message-ID: <7429394.Qh3vguxsr8@xps> (raw)
In-Reply-To: <CAJFAV8yTB+4DZdN+3BOx8Y_cWe6bJFHL3y5=1Do+yW_Gs7CVTQ@mail.gmail.com>
27/11/2019 15:07, David Marchand:
> On Wed, Nov 27, 2019 at 3:06 PM Ferruh Yigit <ferruh.yigit@intel.com> wrote:
> >
> > On 11/27/2019 1:42 PM, Thomas Monjalon wrote:
> > > A buffer overflow happens in testpmd with some drivers
> > > since the queue arrays are limited to RTE_MAX_QUEUES_PER_PORT.
> > >
> > > The advertised capabilities of mlx4, mlx5 and softnic
> > > for the number of queues were the maximum number: UINT16_MAX.
> > > They must be limited by the configured RTE_MAX_QUEUES_PER_PORT
> > > that applications expect to be respected.
> > >
> > > The limitation is applied in above drivers having no limitation,
> > > and at ethdev level (function rte_eth_dev_info_get), in order
> > > to force the configured limit for all drivers.
> >
> > The limit is not device limit, should we reflect it into PMDs?
> > Why not keep the limit only in the ethdev?
>
> +1.
Yes ethdev is enough.
I thought it would be better to document the limit in the PMDs as well,
instead of keeping gigantic max.
I can change if you feel strong about it.
next prev parent reply other threads:[~2019-11-27 14:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-27 13:42 Thomas Monjalon
2019-11-27 14:05 ` Ferruh Yigit
2019-11-27 14:07 ` David Marchand
2019-11-27 14:11 ` Thomas Monjalon [this message]
2019-11-27 14:14 ` Ferruh Yigit
2019-11-27 14:15 ` Ferruh Yigit
2019-11-27 14:30 ` David Marchand
2019-11-27 14:31 ` [dpdk-stable] [PATCH v2] " Thomas Monjalon
2019-11-27 14:47 ` David Marchand
2019-11-27 15:09 ` Thomas Monjalon
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