From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 2F1FEA04B5 for ; Thu, 29 Oct 2020 22:49:35 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 7F898CA86; Thu, 29 Oct 2020 22:49:33 +0100 (CET) Received: from mail-pf1-f181.google.com (mail-pf1-f181.google.com [209.85.210.181]) by dpdk.org (Postfix) with ESMTP id 98D36CA74 for ; Thu, 29 Oct 2020 22:49:31 +0100 (CET) Received: by mail-pf1-f181.google.com with SMTP id 13so3502990pfy.4 for ; Thu, 29 Oct 2020 14:49:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=17CkFTwkRP1QxLK2DSh3I/n8DJPlRxcYptX4D3uP3Yk=; b=o+mGktiS36cfXGRJ7/pbcRJORE+BmoNnMUOx3tkPywHZ5sOC0cRgR2GloZSz2s7r8O 2f5Uge4UxUkBd52f7BYITGvn47D9se51l6qMgD2FGugkboeQ19Et8xQPNCk3UV86mIxe HQikXJGe2MRjZvZsOcrKmkg2adrKa/Q+sX0vdHBJJj0ChXcrW6xgBvJcvs+Ct5SrFi7k 0C5JWW35qqrppPy2i/2SjUwjYrkuAEvEVjjM06HYwt+nZOvbUcdvOnT9lMzCSusztk9P XqkGbCDaZYqPaUQJwPeadm+NuU5EpI1t0djGWGFB0SD/BB5s13/JOBxq1hqVsFvIBLKF W1yQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=17CkFTwkRP1QxLK2DSh3I/n8DJPlRxcYptX4D3uP3Yk=; b=dp6cXRil8R+Nz4m1Z3iHgsnJHDNOPgtYll2OlR6dSCutsM8ZXcLfqRUhmDqI1xYlr0 pr+VCWaRc0aYbayn/Gc9YxhRwweMwA44aWD+AUGg6t1GCcJ/dgAI4J5Usxs5+2s8B1uL IaJLmXzDEcBpocqMG2QObKxS2VWoG2WQBRB7X3WeDyBgBYQ5z3dw3aQ2uToeAgF6RiQ+ BV8fskrtFKetac3r8UyV9Kz40QWUKZpEtR/lJPSWBqC8Vxq30eS15WxZLwrjPkAsykZ/ G32qlxglGo/VHweQ/RYktlxib7V3Z3zD13jPg0yo+PH/Zl7Go3GBPdB000HcRGwachK4 jRSQ== X-Gm-Message-State: AOAM530gC5h5c8aPZo6yKf7kD2VGn8KCVZq4ubKAzFj6OPRo+bVyG2G8 KmkyPrPEMNlmplRLzZIb+Efglw== X-Google-Smtp-Source: ABdhPJy6H+DOqDZcgVEz7cItNcHNemw9FzXKTSRx9vJlYYJbic+2Is9trRgOl68Uvul9YYsVuvgVAw== X-Received: by 2002:a17:90a:1596:: with SMTP id m22mr1877843pja.189.1604008169706; Thu, 29 Oct 2020 14:49:29 -0700 (PDT) Received: from hermes.local (204-195-22-127.wavecable.com. [204.195.22.127]) by smtp.gmail.com with ESMTPSA id y13sm3808562pfr.209.2020.10.29.14.49.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Oct 2020 14:49:29 -0700 (PDT) Date: Thu, 29 Oct 2020 14:49:21 -0700 From: Stephen Hemminger To: Thomas Monjalon Cc: Alexander Kotliarov , users@dpdk.org, Ray Kinsella , david.marchand@redhat.com, ferruh.yigit@intel.com, bruce.richardson@intel.com Message-ID: <20201029144921.07ff4831@hermes.local> In-Reply-To: <3222028.xZJDvd7WxQ@thomas> References: <3222028.xZJDvd7WxQ@thomas> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-users] Changes to DPDK kmod drivers / backward compatibility within LTS rel. X-BeenThere: users@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK usage discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: users-bounces@dpdk.org Sender: "users" On Thu, 29 Oct 2020 22:07:38 +0100 Thomas Monjalon wrote: > 24/09/2020 19:12, Alexander Kotliarov: > > Hi there! > > I would like to find out what is the policy regarding changes to the DPDK's > > kmod drivers such as igb_uio.ko within a DPDK's LTS release. Are these > > changes backward compatible? > > For example, is there a guarantee that an application built > > against 19.11.5, where igb_uio.ko received changes,would run with this > > driver built from 19.11.1 version? > > > > Does http://doc.dpdk.org/guides/contributing/stable.html section 8.4 apply > > to kmod drivers as well? > > There is no such formal guarantee, but in my opinion, > it should be the case. Do you imagine a change in kmod > which could break a DPDK version? Why do you still need to use igb_uio? Can you use vfio instead?