From: Stephen Hemminger <stephen@networkplumber.org>
To: Frank Dressler <frank@dressler.pro>
Cc: dev@dpdk.org
Subject: Re: [PATCH 0/2] fix AF_PACKET PMD rollover fanout mode
Date: Fri, 23 Oct 2026 10:11:43 -0700 [thread overview]
Message-ID: <20261023101143.6b47a0ea@phoenix.local> (raw)
In-Reply-To: <20261023162247.276245-1-frank@dressler.pro>
On Fri, 23 Oct 2026 17:22:45 +0100
Frank Dressler <frank@dressler.pro> wrote:
> This series fixes a bug in the AF_PACKET PMD that prevented it from
> running in rollover fanout mode.
>
> History: 364e08f2bb introduced the AF_PACKET PMD in 2014 and
> unconditionally set the rollover flag. In 2025, d3bc77ab05 added
> code allowing the user to select the fanout mode, including rollover
> mode. Both the flag and the mode were introduced in Linux in 2013
> with 77f65ebdca but their combination has been rejected ever since.
> Because of that, rollover mode has never worked in the PMD.
>
> The first patch clears the rollover _flag_ when the rollover _mode_
> is set.
>
> The second patch adds a test that checks that each fanout mode the
> PMD supports is accepted by the kernel.
>
> Frank Dressler (2):
> net/af_packet: do not set rollover flag in rollover mode
> test/af_packet: add test for fanout modes
LGTM - applied to next-net
prev parent reply other threads:[~2026-10-23 17:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 16:22 [PATCH 0/2] fix AF_PACKET PMD rollover fanout mode Frank Dressler
2026-10-23 16:22 ` [PATCH 1/2] net/af_packet: do not set rollover flag in rollover mode Frank Dressler
2026-10-23 16:22 ` [PATCH 2/2] test/af_packet: add test for fanout modes Frank Dressler
2026-10-23 17:11 ` Stephen Hemminger [this message]
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