From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout-p-202.mailbox.org (mout-p-202.mailbox.org [80.241.56.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4A71800 for ; Thu, 7 May 2026 00:14:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778112899; cv=none; b=Jo1/qgnV+DQwBnkTxcV7z91ygeS7Wsdkh5ecRccD3NR1eGcEV2r12wFv86JdnbbLOiNn6t0Rq2qQIg6QQQtf6G2/kjzE/nmME4hSb2wXhKD2r7HymNmGQ5jWtEeTb/2M6CBPm6qC7wRl8KtuAZkktgEhYHS0kF0uJH23Hdh7c5U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778112899; c=relaxed/simple; bh=xfaw4SbLzf+eaeycSPwFyC57bv4mI3tCqdQhG+RRAZE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=fEtqwJNf3bpWhUljRGS2FHJFVBs0OFK+5PV3lj1lRsRo0pP9X+1D3m3OyBaOBnuofJv3aJ0SIjFW6uzVJWLwoBvfxWp2DM31TiFlLtA0blMRg9gtf/KfszZ/Ok/CuaiMOFhF2Zg7ci2XBXD6x3534G7UCZeLueQrxi/U91xQMSs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=AJHLtxSV; arc=none smtp.client-ip=80.241.56.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="AJHLtxSV" Received: from smtp202.mailbox.org (smtp202.mailbox.org [IPv6:2001:67c:2050:b231:465::202]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-202.mailbox.org (Postfix) with ESMTPS id 4g9t6Z5cfQz9t0p; Thu, 7 May 2026 02:14:46 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1778112886; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=iRp7Cl2HuKwi7sTsNTqG44nTcqyQXaooqqRcWOa6J1o=; b=AJHLtxSVn4xXJfPgf8nVHvnvXvhwn5TLlWmA2R6pRUFW56VqVEg8gnEB3+YaK/5H7KEuKL 3Q8zYy+EpqIsg+Kw9i17DFZB9/aKIEwlVASFKTiMED/o8B1Slg6zsZs2b1p3OU3uDrz3fF u/V5QeYKjIuZlLgfZR5AjOfFM7j/DFH+CYC3GpzkTk/WCVKS+kMCGOzpnxyd2lgCKnm0UT PUxXWES+V9OGDhKpkHLl7MOY22NQAbFFfu5XrwQ+rksNEV5joMfArJCGX6XxxSFtSYPFhL HcTAghikNYp5YNz3chr6wicIfUyiyQKJc+K6mWkCeoSdqCQt1QdQBIYTw9G5AQ== Message-ID: <1c62365a-dc47-49c1-8f80-28d459a08073@mailbox.org> Date: Thu, 7 May 2026 02:14:38 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [Regression in 7.0] OLPC-XO-1.5 will not boot after commit 157266edcc To: Thorsten Leemhuis , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen Cc: "linux-kernel@vger.kernel.org" , Linux kernel regressions list , the arch/x86 maintainers , David Gow References: <7a0c8eec-2e97-4eaf-a8aa-f7e97da93908@mailbox.org> <00b05188-c352-42b9-888a-01e9bf00fb34@leemhuis.info> Content-Language: en-US From: An Autocrypt: addr=an.m@mailbox.org; keydata= xjMEZ2CKehYJKwYBBAHaRw8BAQdAvfR1JEq0mSlLCQwcOeAl2HJry38Kw1GHol8sPFDi+efN FUFuIDxhbi5tQG1haWxib3gub3JnPsKJBBMWCAAxFiEErzG7VMqA+0YshaGzid5SicaPpuwF AmdginoCGwMECwkIBwUVCAkKCwUWAgMBAAAKCRCJ3lKJxo+m7EsHAPwISvlSbB1SLXRiA66A zlxg6R50geZ6Ifs7qRoSg72AgwEAkF4CtBdvoyzRrYF6neV9upoNmEdR7bjFpM5SomBKKg/O OARnYIp6EgorBgEEAZdVAQUBAQdAeD/lXk9E/+te8aCd+lw9CS+MTJ+GWVX51H6+cG3LhTsD AQgHwngEGBYIACAWIQSvMbtUyoD7RiyFobOJ3lKJxo+m7AUCZ2CKegIbDAAKCRCJ3lKJxo+m 7Oh1AP9qHFwpB/ZnofK5G8kcqk8KlmZy7A6iwqsUk7/bNZyp3AEA9kPdrLFPq8S7xvY0m+Ss Rm7xGx4z96H9icfVBBWOaA0= In-Reply-To: <00b05188-c352-42b9-888a-01e9bf00fb34@leemhuis.info> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-MBO-RS-META: 5wrdb7hf8m6h7haej4p7gz6wz6cm3qut X-MBO-RS-ID: 5e7d4d19fccfdf469c4 On 06/05/2026 10.07, Thorsten Leemhuis wrote: > Lo! Looks like nothing happened since the report (please correct me if > I'm wrong, it's easy to miss something). Adding a few more people and > lists to the recipients of this reply, maybe that will things rolling > > FWIW, the culprit seems to be 157266edcc5671 ("x86/boot/e820: Simplify > append_e820_table() and remove restriction on single-entry tables") > [v7.0-rc1] from Ingo. > > Therefore adding David Gow, who submitted a fix for the culprit -- but > that didn't make it anywhere afaics, unless I'm missing something. For > details see: > https://lore.kernel.org/all/20260416065746.1896647-1-david@davidgow.net/ > > Ciao, Thorsten Thanks Thorsten! No, nothing happened here. I have not been able to grok the program flow. Now reading David's patch, the "initially no entry at all" bit escaped me. Oh well. I have compiled and booted mainline (today's git) with David's patch applied just now. It works for me too. Thank you David! And thanks all, An > On 4/19/26 22:08, An wrote: >> On 19/04/2026 10.46, An wrote: >>> [please keep me in CC, I'm not subscribed] >>> >>> Hi Ingo, >>> >>> my OLPC XO-1.5 stopped booting when switching from 6.19 to 7.0 >>> >>> I bisected this to >>> >>> commit 157266edcc56715323de1bd60e49194b3b66a174 >>> Author: Ingo Molnar >>> Date:   Thu May 15 14:05:41 2025 +0200 >>> >>>      x86/boot/e820: Simplify append_e820_table() and remove >>> restriction on single-entry tables >>> >>> The XO boots from a forth environment and is rather quirky. >>> If I can help with any logs or tests, please let me know. >>> >>> I'm compiling a 7.0 kernel with the patch reverted, >>> but it smells like a plain revert isn't the best idea. >>> >>> Thank you, >>> An Müller >>> >> >> I've tested both 7.0 and current mainline: with this patch reverted, >> they boot fine, the revert applies cleanly in both cases. >> >> Thanks, >> An >