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From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: Hemant Agrawal <hemant.agrawal@nxp.com>,
	Thomas Monjalon <thomas@monjalon.net>,
	Gagandeep Singh <G.Singh@nxp.com>
Cc: David Marchand <david.marchand@redhat.com>, dev <dev@dpdk.org>,
	Olivier Matz <olivier.matz@6wind.com>,
	Andrew Rybchenko <arybchenko@solarflare.com>,
	Nipun Gupta <nipun.gupta@nxp.com>
Subject: Re: [dpdk-dev] [PATCH] eal: change max hugepage sizes to 4
Date: Mon, 12 Aug 2019 10:42:05 +0100
Message-ID: <73c08d16-aa3c-7e82-7747-d18e8fc32ed2@intel.com> (raw)
In-Reply-To: <VI1PR0401MB25416710B44AAD881BED4D1389D40@VI1PR0401MB2541.eurprd04.prod.outlook.com>

On 07-Aug-19 2:28 PM, Hemant Agrawal wrote:
> HI Thomas,
> 
>>>> DPDK currently is supporting maximum 3 hugepage, sizes whereas
>>>> system can support more than this e.g.
>>>> 64K, 2M, 32M and 1G.
>>>
>>> You can mention ARM platform here, and that this issue starts with
>>> kernel 5.2 (and I would try to mention this in the title as well).
>>> This is better than an annotation that will be lost.
>>>
>>>
>>>> Having these four hugepage sizes available to use by DPDK, which is
>>>> valid in case of '--in-memory' EAL option or using 4 separate mount
>>>> points for each hugepage size;
>>>> hugepage_info_init() API reports an error.
>>>
>>> Can you describe what is the impact from a user point of view rather
>>> than mentioning this internal function?
>>
>> Yes please, we need to understand how much it is critical.
>> Should we Cc stable@dpdk.org for backport?
>> Should it be merged at the last minute in 19.08?
>>
> 
> VPP usages in-memory option. So, VPP on ARM with kernel 5.2 wont' work without this patch.
> 

Off-topic, but it's nice to see real-world usage for this option!

-- 
Thanks,
Anatoly

  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-07 10:12 Gagandeep Singh
2019-08-07 12:00 ` David Marchand
2019-08-07 12:07   ` Thomas Monjalon
2019-08-07 13:28     ` Hemant Agrawal
2019-08-08  7:31       ` Thomas Monjalon
2019-08-12  9:43         ` Burakov, Anatoly
2019-08-12  9:49           ` David Marchand
2019-08-12 10:01             ` Thomas Monjalon
2019-08-12 10:38             ` Burakov, Anatoly
2019-08-08  7:33       ` David Marchand
2019-08-08  9:00         ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-08-08 10:37         ` [dpdk-dev] " Hemant Agrawal
2019-08-08 12:29           ` Steve Capper
2019-08-08 12:39             ` David Marchand
2019-08-12  9:42       ` Burakov, Anatoly [this message]
2019-08-07 15:27 ` Stephen Hemminger
2019-08-08 12:13 ` [dpdk-dev] [PATCH v2] eal: change max hugepage sizes to 4 for ARM platforms Gagandeep Singh
2019-08-08 12:37   ` [dpdk-dev] [dpdk-stable] " David Marchand
2019-08-08 15:26     ` Thomas Monjalon
2019-08-07 12:47 [dpdk-dev] [PATCH] eal: change max hugepage sizes to 4 Gagandeep Singh
2019-08-07 12:53 Gagandeep Singh
2019-08-07 14:09 ` Honnappa Nagarahalli
2019-08-08  9:00 Gagandeep Singh
2019-08-08  9:22 ` David Marchand

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