From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f54.google.com (mail-oa1-f54.google.com [209.85.160.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 27F5D6138 for ; Thu, 18 Apr 2024 02:07:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713406050; cv=none; b=q2lIkUww2Fy+GmUAD6FaqFJReyEefuCN0UojoaKUIGcs4YA89pz6yGtO6tTHEPKII13ptE1NmDfqUysu6jm3Za82GZymKNNj1pgYEr8rlqUW0WBySNZSZgNCyR61yWoB7hrFisFoyQo6G2GhEvYtsczobDXC5UV4MV3IR3axIE0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713406050; c=relaxed/simple; bh=+KEGnBcOMKQg1e6jhwZpTqi+bVvKRdapHRMb2dM0wtw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=PJYyN/c9afp9VkVESA7pKVnvhMZpkEfkvpvhX2SG9l4HeLUBUMEIajlinTnL4wX/U9pqUdgkA6ss1G4K5cNjoPMGXNFShmegfQFF6cjq0cLtpp/MC6u4GItymtASLzPGgTJ8zS4txygTYqc1HNb7NFtHKJW+8oCFmIaezViU0rU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ASVVbVwz; arc=none smtp.client-ip=209.85.160.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ASVVbVwz" Received: by mail-oa1-f54.google.com with SMTP id 586e51a60fabf-22fa18566adso206099fac.0 for ; Wed, 17 Apr 2024 19:07:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1713406048; x=1714010848; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:from:to:cc:subject:date:message-id :reply-to; bh=0cZvLjNhi5psGTi/M7oTNlbzmf7LpqbmTlYFheoOKB8=; b=ASVVbVwzZ4sx9/Jkpm3Lqw5y3aFM+/HOAkx93baMcwocGvZdYMGS77yneIcjgMtLH3 XDKj4/XdLceJxgsdm9eHMlaxawLzWsEQ2OdV+a2byzqwA5LLFjDfZZb9ODX32brssK0S Nplfaz63D42ERia5GcnzL+7kcHju4nNjY/LaXCMaZlAh73EAxn+kiA0nfShwEVqFjj8S NPc0U2D06IZr/UqRAnjkBQnMzwjEJTtgnG1GrDpgW4Ni3QLmDnpr78JEDt3eMvMpW4BN GcfDr7j3Rp5vDmYbXLp7MT1lkq0dTo0W61zmAmUf9xGFHBlV9/d+uX7pi2n6ZX7eQuSn EdUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713406048; x=1714010848; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:sender:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0cZvLjNhi5psGTi/M7oTNlbzmf7LpqbmTlYFheoOKB8=; b=SyFa8aPj3kaLLrxM2QCaiEpX04UCyruy38UUKQZ5E6RSA4cbNUiZVNBnuXVpGNGfry zn4I6hD1CY5hae1ZMBblO3UJlEGx4l2MXz4U+L6ycgKTqerlnCIVrBPwa4j4l/v3EC9S HCu6R0jH8dYEtywNtXdS8/krfo81rc02NBDIp2+3/rKei5b1Gx/cvKPnl0fWA35yH9qJ bHTlfcOz5oIpnBRA6Cq6MQkWUlFOibt9FZhrNnmYTD4cHWMp/fQOIV3wpmDgnd7SFsXg 2SOawbsEL+BLzovEMa6kL88jUJLz0a9GKyDmy3RKYR0qZSQXt1Jl02MLg/WfwMvm+oh0 eCxA== X-Forwarded-Encrypted: i=1; AJvYcCULBdNTELDXFCbdWGZtf7dhsUSLA6Yo0NceXCUAOUZPtLOOg0BxuBU8oWbMgapMbus4gtqVWJmcBFt15Q2aUsI4uBwTCNWcMhvU9jzM X-Gm-Message-State: AOJu0YydUdEQMWAPX0n4CLTPHFcNTHRl9VjskCrAfIbMsmvGJnlOS8es o1bbnh0nHQ8hBopd2MLNZsWRbv8RI33j+LkvQkTfxfXVN2EszzA5 X-Google-Smtp-Source: AGHT+IHkRREgGYfHbnLerfWwG1l/nPL22jRK5el/rJ7qosjGL2kgjZfx5vUtE7jmFBUVX7TkEjKdJw== X-Received: by 2002:a05:6870:610c:b0:22a:6c9a:ece8 with SMTP id s12-20020a056870610c00b0022a6c9aece8mr1783850oae.21.1713406048246; Wed, 17 Apr 2024 19:07:28 -0700 (PDT) Received: from localhost ([2620:10d:c090:400::5:6f51]) by smtp.gmail.com with ESMTPSA id kq12-20020a056a004b0c00b006e6c81b6055sm356551pfb.6.2024.04.17.19.07.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Apr 2024 19:07:27 -0700 (PDT) Sender: Tejun Heo Date: Wed, 17 Apr 2024 16:07:26 -1000 From: Tejun Heo To: Linux regressions mailing list Cc: Bjorn Andersson , LKML Subject: Re: Bug 218665 - nohz_full=0 prevents kernel from booting Message-ID: References: <5be248c6-cdda-4d2e-8fae-30fc2cc124c0@leemhuis.info> <28c84b3b-f68f-4f45-8da1-9c3f9a342509@leemhuis.info> <7kugx5ivbplwwrcq5zp37djtpakl55b3pfy36gpbsbcx43dpcs@uheu6iv7gm7h> <81149f18-0132-4ace-8c71-1b75790a88e4@leemhuis.info> <51942e58-a5a3-4dcd-80c1-6735c7b5cc1e@leemhuis.info> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51942e58-a5a3-4dcd-80c1-6735c7b5cc1e@leemhuis.info> Hello, Thorsten. On Wed, Apr 17, 2024 at 07:48:33AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: > > Can you elaborate why Bjorn's case is different? > > Well "not booting at all when using 'nohz_full=0'"[as reported two > times] and "I start neovim, send SIGSTOP (i.e. ^Z) to it, start another > neovim instance and upon sending SIGSTOP to that instance all of > userspace locks up - 100% reproducible."[while no 'nohz_full=0' in use] > at least on the first sight to and outsider sound a lot like different > problems to me -- but of course that impression might be wrong and you > know better about these things. You are right. That is very different. > > I was assuming it was the > > same problem and that Oleg's fixes would address the issue. > > Bjorn, could you give it a try? Yeah, I'm curious whether it's just a different symptom of the same problem. Thanks. -- tejun