From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Maxime Leroy" <maxime@leroys.fr>, <dev@dpdk.org>
Cc: <stable@dpdk.org>,
"Stephen Hemminger" <stephen@networkplumber.org>,
"Thomas Monjalon" <thomas@monjalon.net>,
"Andrew Rybchenko" <andrew.rybchenko@oktetlabs.ru>,
"Sunil Kumar Kori" <skori@marvell.com>
Subject: RE: [PATCH 2/2] ethdev: return 0 from dummy queue count
Date: Tue, 16 Jun 2026 11:54:55 +0200 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35F65910@smartserver.smartshare.dk> (raw)
In-Reply-To: <20260616094259.686555-3-maxime@leroys.fr>
> From: Maxime Leroy [mailto:maxime.leroys@gmail.com] On Behalf Of Maxime
> Leroy
> Sent: Tuesday, 16 June 2026 11.43
>
> The dummy rx_queue_count/tx_queue_count callback returned -ENOTSUP. On
> a
> port that is not started (freshly allocated, or stopped once the fast-
> path
> ops are reset to dummies) there are no packets queued, so the truthful
> answer is 0, not an error: querying the count is not an unsupported
> operation. This also matches the dummy Rx/Tx burst, which reports 0
> packets.
>
> A poll-mode worker checking rte_eth_rx_queue_count() across a
> concurrent
> port stop then sees an empty queue instead of a negative error.
>
> Fixes: 066f3d9cc21c ("ethdev: remove callback checks from fast path")
> Cc: stable@dpdk.org
>
> Suggested-by: Stephen Hemminger <stephen@networkplumber.org>
> Signed-off-by: Maxime Leroy <maxime@leroys.fr>
> ---
Acked-by: Morten Brørup <mb@smartsharesystems.com>
next prev parent reply other threads:[~2026-06-16 9:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-16 9:42 [PATCH 0/2] ethdev: fix fast-path ops on a stopped port Maxime Leroy
2026-06-16 9:42 ` [PATCH 1/2] ethdev: keep fast-path ops valid after port stop Maxime Leroy
2026-06-16 9:42 ` [PATCH 2/2] ethdev: return 0 from dummy queue count Maxime Leroy
2026-06-16 9:54 ` Morten Brørup [this message]
2026-06-16 14:07 ` Stephen Hemminger
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