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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-73bb1e4f85csm205221b3a.132.2025.04.08.20.54.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Apr 2025 20:54:18 -0700 (PDT) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger , =?UTF-8?q?Morten=20Br=C3=B8rup?= Subject: [PATCH] doc: update kernel version requirement Date: Tue, 8 Apr 2025 20:50:07 -0700 Message-ID: <20250409035408.199320-1-stephen@networkplumber.org> X-Mailer: git-send-email 2.47.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The 4.19 kernel version was end of life in December 2024. Update to 5.4 and also add better description of what "not supported" means in this case. Signed-off-by: Stephen Hemminger Acked-by: Morten Brørup --- doc/guides/linux_gsg/sys_reqs.rst | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/doc/guides/linux_gsg/sys_reqs.rst b/doc/guides/linux_gsg/sys_reqs.rst index 5a7d9e4a43..cab198134b 100644 --- a/doc/guides/linux_gsg/sys_reqs.rst +++ b/doc/guides/linux_gsg/sys_reqs.rst @@ -105,11 +105,18 @@ System Software **Required:** -* Kernel version >= 4.19 - - The kernel version required is based on the oldest long term stable kernel available - at kernel.org when the DPDK version is in development. - Compatibility for recent distribution kernels will be kept, notably RHEL/CentOS 7. +* Kernel version >= 5.4 + + The Linux userspace API is compatible across releases but there are some + restrictions. The oldest kernel tested by the DPDK testing infrastructure + is the oldest maintained Long Term Stable (LTS) at time of release. + The DPDK is likely to still work with older releases but it is not guaranteed. + Compatibility for recent distribution kernels will be kept, notably RHEL, and Ubuntu. + It may work on older distributions, past End Of Life (EOL) like RHEL7 + but this is no longer tested or guaranteed to work. + + Some drivers and hardware support may require more recent kernels, check the + documentation (e.g. :doc:`../nics/index`) The kernel version in use can be checked using the command:: -- 2.47.2