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[204.195.112.43]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ea946778ccsm3124315ad.9.2026.10.23.10.11.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Oct 2026 10:11:45 -0700 (PDT) Date: Fri, 23 Oct 2026 10:11:43 -0700 From: Stephen Hemminger To: Frank Dressler Cc: dev@dpdk.org Subject: Re: [PATCH 0/2] fix AF_PACKET PMD rollover fanout mode Message-ID: <20261023101143.6b47a0ea@phoenix.local> In-Reply-To: <20261023162247.276245-1-frank@dressler.pro> References: <20261023162247.276245-1-frank@dressler.pro> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Fri, 23 Oct 2026 17:22:45 +0100 Frank Dressler 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