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Subject: RE: [PATCH] net/intel: improve Rx descriptor ring size checks
Date: Mon, 15 Dec 2025 18:54:50 +0100
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Thread-Topic: [PATCH] net/intel: improve Rx descriptor ring size checks
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Bruce Richardson" <bruce.richardson@intel.com>,
	<dev@dpdk.org>
Cc: "Praveen Shetty" <praveen.shetty@intel.com>,
 "Vladimir Medvedkin" <vladimir.medvedkin@intel.com>,
 "Anatoly Burakov" <anatoly.burakov@intel.com>,
 "Jingjing Wu" <jingjing.wu@intel.com>
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> From: Bruce Richardson [mailto:bruce.richardson@intel.com]
> Sent: Monday, 15 December 2025 18.36
>=20
> The default Rx ring size checks did not account for the fact that the
> port would not work correctly if the Rx ring size was only twice the
> free threshold size or less, so add in a new check for this. This =
would
> generally only apply in cases where very small rings sizes are being
> used, for example, with default Rx free thresh of 32, only ring size =
of
> 64 would cause issues.
>=20
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---

Does dev_info.rx_desc_lim.nb_min returned by rte_eth_dev_info_get() need =
correction too?