From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:c151::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id 4EfVAtDHQWC1XgAA0tVLHw (envelope-from ) for ; Fri, 05 Mar 2021 05:55:28 +0000 Received: from aspmx2.migadu.com ([2001:41d0:2:c151::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id cDUWOs/HQWCZFwAAbx9fmQ (envelope-from ) for ; Fri, 05 Mar 2021 05:55:27 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx2.migadu.com (Postfix) with ESMTPS id 8B03914F77 for ; Fri, 5 Mar 2021 06:55:27 +0100 (CET) Received: from localhost ([::1]:59616 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lI3Qs-0006hV-Kb for larch@yhetil.org; Fri, 05 Mar 2021 00:55:26 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:50418) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lI3Pr-0006gy-PQ for guix-devel@gnu.org; Fri, 05 Mar 2021 00:54:23 -0500 Received: from imta-35.everyone.net ([216.200.145.35]:39226 helo=imta-38.everyone.net) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lI3Po-0002Je-5r for guix-devel@gnu.org; Fri, 05 Mar 2021 00:54:22 -0500 Received: from pps.filterd (m0004961.ppops.net [127.0.0.1]) by imta-38.everyone.net (8.16.0.43/8.16.0.43) with SMTP id 1255mw2g024037 for ; Thu, 4 Mar 2021 21:54:17 -0800 X-Eon-Originating-Account: sUc_EaewjKnKof7cj78Kndjzzjy0K0TQtJ2H1Y-ZfdE X-Eon-Dm: m0116293.ppops.net Received: by m0116293.mta.everyone.net (EON-AUTHRELAY2 - 53b92303) id m0116293.603eb1d3.2ef3a for ; Thu, 4 Mar 2021 21:54:15 -0800 X-Eon-Sig: AQMHrIJgQceHoB20hQIAAAAB,d3bc2121175fbd38e4e0ef4711428cc0 X-Eip: nMB8BQbWY6zTGroBEtJJwBCwBcEj6iX18TVy9NlHE3M Date: Fri, 5 Mar 2021 06:54:05 +0100 From: Bengt Richter To: guix-devel Subject: Heads-up from Linus -- potential bisection trainwreck: "A note on the 5.12-rc1 tag" Message-ID: <20210305055405.GA5272@LionPure> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-05_03:2021-03-03, 2021-03-05 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 clxscore=1034 phishscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103050028 Received-SPF: pass client-ip=216.200.145.35; envelope-from=bokr@oz.net; helo=imta-38.everyone.net X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bengt Richter Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1614923727; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:list-id:list-help:list-unsubscribe: list-subscribe:list-post; bh=ZrVXKQXi8DX5b3Pp5lItpWljKOlHg6BJ9dwmLvxCzbg=; b=uReV5MHbiE6f4xpqyeSQ1ZfFzni8cB0EyRnwV38gEMmm7VDbT8+naNM3G+fjcuokpKJahP PDViintVzf9UOUaHPoHEkpBqn4ezmoPrL8t6+oNswWxm1ovEceeGT3xvc20fu7WKi+jqrv XMEl/080G73L4NDuhR8rA+9xIbXFThwSwTxYFrs3aQy00YpXqA9dS4iTWaN+HiiaaNqiIK J7Mx5BsuQInZmaTSZXTFVMen2iQR4Sn5YaEU9P11cldPqped3o5Sz9a3n5UZJ10gvZsHRd 48Lj861dtLP+kO59Cm61l4tDX2cOMagqAebZLLgawzal9B4kdd4aTHCbDKyTYg== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1614923727; a=rsa-sha256; cv=none; b=hDgclYLgBguqLnK7hhbN8+BLkvNsqfIgpbO39rOlfvxXaYnIhayeVyPzPoZyzJCiqvnY/F F/K7M2s9x3Z/vzK6yUq0D2/pXj1h9XhOms0dccawk2o94LxSIodvPfiW0FoqRu4iBfmz/n Q5WauETBGHNAhfs1at43P6GU7dhaM/K1xjsOlbVmL1MXmmABwYnOG/meje0BwYeRz35g4r oO/QZkdF7MUicAvHW7VQsMln4n5NhDE1dadbAfMpKOENVzwHqBEWX+yTwP30/pp1qcwlvX hicsfZP/Tg5PntDuH2t8mSHA/0v0OrCzSlzSDDSPvqeQxbdrX/OrFvaKXPNeOg== ARC-Authentication-Results: i=1; aspmx2.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx2.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Spam-Score: -1.86 Authentication-Results: aspmx2.migadu.com; dkim=none; dmarc=none; spf=pass (aspmx2.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 8B03914F77 X-Spam-Score: -1.86 X-Migadu-Scanner: scn0.migadu.com X-TUID: DnFyupYreF75 Hi, Not so usual to be switching rc kernels for guix I suppose, but this looked worth mentioning anyway: LWN archive link [1] [1]https://lwn.net/ml/linux-kernel/CAHk-=wjnzdLSP3oDxhf9eMTYo7GF-QjaNLBUH1Zk3c4A7X75YA@mail.gmail.com/ In case of link problem, a couple of extractions: --8<---------------cut here---------------start------------->8--- From: Linus Torvalds To: Linux Kernel Mailing List Subject: A note on the 5.12-rc1 tag Date: Wed, 03 Mar 2021 12:53:18 -0800 Message-ID: Hey peeps - some of you may have already noticed that in my public git tree, the "v5.12-rc1" tag has magically been renamed to "v5.12-rc1-dontuse". It's still the same object, it still says "v5.12-rc1" internally, and it is still is signed by me, but the user-visible name of the tag has changed. The reason is fairly straightforward: this merge window, we had a very innocuous code cleanup and simplification that raised no red flags at all, but had a subtle and very nasty bug in it: swap files stopped working right. And they stopped working in a particularly bad way: the offset of the start of the swap file was lost. Swapping still happened, but it happened to the wrong part of the filesystem, with the obvious catastrophic end results. [ -- snip discussion why all will not be hit -- ] But I want everybody to be aware of because _if_ it bites you, it bites you hard, and you can end up with a filesystem that is essentially overwritten by random swap data. This is what we in the industry call "double ungood". --8<---------------cut here---------------end--------------->8--- -- Regards, Bengt Richter