From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: Alejandro Lucero <alejandro.lucero@netronome.com>,
dev <dev@dpdk.org>, Thomas Monjalon <thomas@monjalon.net>,
Ferruh Yigit <ferruh.yigit@intel.com>,
Andrew Rybchenko <arybchenko@solarflare.com>
Subject: Re: [dpdk-dev] secondary processes and private data
Date: Tue, 25 Sep 2018 15:20:02 +0100 [thread overview]
Message-ID: <f331a1a6-e60c-cc90-686c-887a05181af0@intel.com> (raw)
In-Reply-To: <CAD+H991JUfGYR_oV=Da-en6E4LDj9r4nHSfWvYcF47xAxBVsSg@mail.gmail.com>
On 25-Sep-18 3:10 PM, Alejandro Lucero wrote:
> I've a problem when part of device private data needs to be private per
> process.
>
> Current multiprocess support shares device private data between primary
> and secondaries but it is all dependent on a pointer initialized to the
> same memory address by the multiprocess support code. If there is a
> per-process data, If a secondary process changes it the primary gets
> affected, and the same for additional secondaries which will affect not
> just the primary but other previous secondaries.
>
> The solution is to add support for this inside struct rte_eth_dev,
> something like
>
> void *secondary_priv_data;
>
> so it is up to the secondaries to use this field if necessary.
>
> NFP PMD creates the required rte_eth_devs specifically, similar to what
> is done inside rte_ethdev.c but adding initialization for an interface
> needed when calling device ethdev_init function. There are other PMDs
> doing this but none has this requirement for per-process private data.
>
> Please, let me know what you think about this change to struct
> rte_ethdev or if you have a better idea for solving this problem.
>
> Thanks
>
Perhaps "private data" is a bad name for data that is shared across
primary and secondary processes...
I don't have anything against the idea.
--
Thanks,
Anatoly
next prev parent reply other threads:[~2018-09-25 14:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-25 14:10 Alejandro Lucero
2018-09-25 14:20 ` Burakov, Anatoly [this message]
2018-09-26 13:21 ` Thomas Monjalon
2018-09-26 13:49 ` Alejandro Lucero
2018-09-26 14:33 ` Stephen Hemminger
2018-09-26 15:19 ` Alejandro Lucero
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