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Received: from sslproxy05.your-server.de ([78.46.172.2]) by www62.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1wvv4C-000Crc-12; Mon, 17 Aug 2026 12:59:44 +0200 Received: from localhost ([127.0.0.1]) by sslproxy05.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wvv36-0004X2-0o; Mon, 17 Aug 2026 12:59:43 +0200 Message-ID: <6c7fdd8e-bc32-4c33-ad06-39b00af1ccda@iogearbox.net> Date: Mon, 17 Aug 2026 12:59:42 +0200 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 0/5] selftests/xsk: improve shared-UMEM coverage and infrastructure To: Tushar Vyavahare , netdev@vger.kernel.org, magnus.karlsson@intel.com, maciej.fijalkowski@intel.com, stfomichev@gmail.com, kernelxing@tencent.com, davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, ast@kernel.org, tirthendu.sarkar@intel.com, andrii@kernel.org Cc: bpf@vger.kernel.org References: <20260807134209.3794735-1-tushar.vyavahare@intel.com> Content-Language: en-US From: Daniel Borkmann Autocrypt: addr=daniel@iogearbox.net; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Clear (ClamAV 1.4.3/28095/Mon Aug 17 08:23:59 2026) Hi Tushar, On 8/7/26 3:42 PM, Tushar Vyavahare wrote: > AF_XDP shared-UMEM support in existing XSK selftests is limited to a > small set of scenarios and cleanup paths that become fragile as coverage > expands. > > This series improves shared-UMEM testing and infrastructure in five > steps. > > Patch 1 introduces explicit UMEM lifetime management with refcounting > and consolidates socket/UMEM teardown into common helpers, keeping > cleanup behavior consistent across normal completion and error paths. > > Patch 2 adds rollback for partial socket setup in xsk_configure() when > xsk_socket__create() retries are exhausted or busy-poll setup fails. > > Patch 3 adds a length-based XDP steering helper and updates XSKMAP/test > capacity constants for 4-socket scenarios. Steering is explicitly based > on total XDP-visible packet length (data_end - data) using > SHARED_UMEM_LEN_SPLIT. > > Patch 4 adds the shared-UMEM callback runner together with the first > four test cases (4-socket, length-based steering, uneven distribution, > and unaligned chunk mode) in one commit so every SHA in the series > builds and bisects cleanly. The unaligned path snapshots/restores prior > alignment flags with NULL-safe UMEM guards. > > Patch 5 makes pkt_stream_even_odd_sequence() rollback-safe by staging > replacement streams in temporary arrays and committing only after all > allocations succeed. > > Together, these patches make shared-UMEM setup/cleanup more robust and > extend selftest coverage to common multi-socket and distribution > scenarios. > > Signed-off-by: Magnus Karlsson > Signed-off-by: Tushar Vyavahare Looks like this needs a v2 respin based on the LLM reviews. Thanks, Daniel