From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0349C433E0 for ; Thu, 18 Feb 2021 17:09:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BA2664EAD for ; Thu, 18 Feb 2021 17:09:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231233AbhBRRJX (ORCPT ); Thu, 18 Feb 2021 12:09:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:36094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231879AbhBRO35 (ORCPT ); Thu, 18 Feb 2021 09:29:57 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id D9E0264E76; Thu, 18 Feb 2021 14:29:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1613658554; bh=W/vP5B7kuDrYnokP92ychColA8JdWdOs46EX1GvjWFM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=atkky+PvrUMS2jEIL1tOYbPwGA99pLkmcTrYyIl/FmA9pVjRo3Hpa2ZfORr4qJUdd AMIeDbZjjesr+WO//NH9EDXqzfzNoUJbqnRAN3nZwZqKJ77m4o5b/Tjvj/zirbNRGW gGw/9Rix8+I+QKT2h9rLOVg6gYJtQHIZn2Kzgh5U= Date: Thu, 18 Feb 2021 15:29:11 +0100 From: Greg Kroah-Hartman To: Jari Ruusu Cc: Willy Tarreau , Scott Branden , Linux ARM , LKML , BCM Kernel Feedback Subject: Re: 5.10 LTS Kernel: 2 or 6 years? Message-ID: References: <8cf503db-ac4c-a546-13c0-aac6da5c073b@broadcom.com> <20210218113107.GA12547@1wt.eu> <602E766F.758C74D8@users.sourceforge.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <602E766F.758C74D8@users.sourceforge.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 18, 2021 at 04:15:11PM +0200, Jari Ruusu wrote: > Willy Tarreau wrote: > > The only set of fixes that can be trusted are the "official" stable > > kernels, because they are the only ones that are approved by the patches > > authors themselves. Adding more stuff on top of stable kernels is fine > > (and done at your own risk), but randomly dropping stuff from stable > > kernels just because you don't think you need that is totally non-sense > > and must not be done anymore! > > This may be little bit off-topic... but stable kernel.org kernels > can also bit-rot badly because of "selective" backporting... as in > anything that does not apply cleanly gets dropped regardless of > how critical they are. > > I will give you one example: Intel WiFi (iwlwifi) on 4.19.y > kernel.org stable kernels is currently missing many critical > locking fixes. Why has no one asked for the specific upstream commits to be backported if this is the case? > As a result, that in-tree iwlwifi driver causes > erratic behavior to random unrelated processes, and has been doing > so for many months now. My not-so-politically correct opinion is > that in-tree iwlwifi is completely FUBAR unless someone steps up > to do professional quality backport of those locking fixes from > upstream out-of-tree Intel version [1] [2] of the driver. Why does any out-of-tree driver come into play here? What is wrong with the in-kernel code? > For me > only way to get properly working WiFi on my laptop computer is to > compile that Intel out-of-tree version. Sad, but true. Why use 4.19.y on a laptop in the firstplace? That feels very wrong and is not the recommended thing to use the LTS kernels for. thanks, greg k-h