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[84.3.50.134]) by smtp.gmail.com with ESMTPSA id cw14sm3624796edb.8.2021.03.06.04.54.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Mar 2021 04:54:39 -0800 (PST) Sender: Ingo Molnar Date: Sat, 6 Mar 2021 13:54:37 +0100 From: Ingo Molnar To: Linus Torvalds , Stephen Rothwell , Andrew Morton Cc: Pavel Machek , Krzysztof Kozlowski , Linux Kernel Mailing List , Borislav Petkov , Thomas Gleixner , Peter Zijlstra Subject: Re: A note on the 5.12-rc1 tag Message-ID: <20210306125437.GA436274@gmail.com> References: <20210304124314.GA9979@duo.ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Linus Torvalds wrote: > But I also can heartily just recommend that people who already _did_ > start on rc1 to rebase their current - hopefully not extensive - work. Thanks for the heads-up - we just rebased about 50 commits in -tip to avoid this bug: our normal workflow is to jump on -rc1 once it's released and integrate pending development work that we normally don't apply during the merge window. So our special pattern of pent-up merging did bite us a little bit - but nothing particularly serious. > I know I've ranted about rebasing for years, and it has huge > downsides, but the operation does exist because sometimes you just > need to fix serious errors. So _mindful_ rebasing, understanding why > it shouldn't be a normal thing, but doing it when something > exceptional happens - that's not wrong. Yeah, and in this case not sending scarce-resource testers & bisecters into the middle of a file corruption bug is definitely the right thing to do. Maybe -next could double check that none of the maintainer trees have an -rc1 base? Your note here was kind of low-key. :-) And maybe there's some bisection helper annotation or hook-script that can be embedded in the kernel Git tree to avoid or at least warn about particularly nasty bugs? Thanks, Ingo