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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45D5EC47089 for ; Wed, 7 Dec 2022 07:50:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229731AbiLGHu5 (ORCPT ); Wed, 7 Dec 2022 02:50:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229523AbiLGHuz (ORCPT ); Wed, 7 Dec 2022 02:50:55 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B47532F3B0 for ; Tue, 6 Dec 2022 23:50:54 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 717FFB815C9 for ; Wed, 7 Dec 2022 07:50:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1BC25C433C1; Wed, 7 Dec 2022 07:50:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670399452; bh=5jlubpu3hv7gKSSUUnb9ZTzv2xyFMeitpywQVmBs7i4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=TLM9PRyqlGJBPrjPNAQAgMAAoZw8XntKFdQADfLO11A8YLALVYH3JaylM16awxXPD Z1etOtXNuoKykJKkLmkTkc+C1Y5vKQkVWOz2su4/niLXjzWncQqT3kRQR6YCyWLmlu mbjUH7H4To4YIpkiqM8VPcw0q+i6sqDWoVppv0V1QGOfgKZGVQ9DMdAIXm2mcMcWkj K0n9mU58MZK3sNueC/OoJZcICPOzkpo72CStU/hAzJn/Y6d1bniYYNinyvDA0npsr3 MbUSHlD1SS4ihIGkq/Ie0levx8XZVpaWPPPDv7Al8ybWUOHIzYjp/F6N7reEdkooVc cdNoQWvcv1JFA== Received: from ip-185-104-136-29.ptr.icomera.net ([185.104.136.29] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1p2pCb-00B1kc-4L; Wed, 07 Dec 2022 07:50:49 +0000 Date: Wed, 07 Dec 2022 07:49:08 +0000 Message-ID: <877cz3u00b.wl-maz@kernel.org> From: Marc Zyngier To: Paolo Bonzini Cc: Mark Brown , Sean Christopherson , Andrew Jones , Andrew Morton , Anshuman Khandual , Arnaldo Carvalho de Melo , Bagas Sanjaya , Ben Gardon , Catalin Marinas , Cornelia Huck , Fuad Tabba , Gavin Shan , Jakub Kicinski , James Morse , "Maciej S . Szmigiero" , Marek Szyprowski , Mark Rutland , Oliver Upton , Peter Collingbourne , Peter Xu , Philippe =?UTF-8?B?TWF0aGlldS1EYXVkw6k=?= , Quentin Perret , Reiji Watanabe , Ricardo Koller , Ryan Roberts , Steven Price , Usama Arif , Vincent Donnefort , Will Deacon , Zhiyuan Dai , Suzuki K Poulose , Alexandru Elisei , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, kvm@vger.kernel.org Subject: Re: [GIT PULL] KVM/arm64 updates for 6.2 In-Reply-To: <28e7f298-972b-2cb8-df80-951076724c73@redhat.com> References: <20221205155845.233018-1-maz@kernel.org> <3230b8bd-b763-9ad1-769b-68e6555e4100@redhat.com> <28e7f298-972b-2cb8-df80-951076724c73@redhat.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.104.136.29 X-SA-Exim-Rcpt-To: pbonzini@redhat.com, broonie@kernel.org, seanjc@google.com, andrew.jones@linux.dev, akpm@linux-foundation.org, anshuman.khandual@arm.com, acme@kernel.org, bagasdotme@gmail.com, bgardon@google.com, catalin.marinas@arm.com, cohuck@redhat.com, tabba@google.com, gshan@redhat.com, kuba@kernel.org, james.morse@arm.com, maciej.szmigiero@oracle.com, m.szyprowski@samsung.com, mark.rutland@arm.com, oliver.upton@linux.dev, pcc@google.com, peterx@redhat.com, philmd@linaro.org, qperret@google.com, reijiw@google.com, ricarkol@google.com, ryan.roberts@arm.com, steven.price@arm.com, usama.arif@bytedance.com, vdonnefort@google.com, will@kernel.org, daizhiyuan@phytium.com.cn, suzuki.poulose@arm.com, alexandru.elisei@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvmarm@lists.linux.dev, kvm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, 06 Dec 2022 21:43:43 +0000, Paolo Bonzini wrote: > > On 12/6/22 19:20, Mark Brown wrote: > >> I almost suggested doing that on multiple occasions this cycle, but ultimately > >> decided not to because it would effectively mean splitting series that touch KVM > >> and selftests into different trees, which would create a different kind of > >> dependency hell. Or maybe a hybrid approach where series that only (or mostly?) > >> touch selftests go into a dedicated tree? > > > > Some other subsystems do have a separate branch for kselftests. One > > fairly common occurrence is that the selftests branch ends up failing to > > build independently because someone adds new ABI together with a > > selftest but the patches adding the ABI don't end up on the same branch > > as the tests which try to use them. That is of course resolvable but > > it's a common friction point. > > Yeah, the right solution is simply to merge selftests changes > separately from the rest and use topic branches. Don't know if this is what you have in mind, but I think that we should use topic branches for *everything*. The only things for which I don't use a separate branch are the odd drive-by patches, of the spelling fix persuasion. That's what we do for arm64 and the IRQ subsystem. It is a bit more involved at queuing time, but makes dropping series from -next extremely easy, without affecting the history. And crucially, it gives everyone a hint to base their stuff on a stable commit, not a random "tip of kvm/queue as of three days ago". M. -- Without deviation from the norm, progress is not possible.