From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f51.google.com (mail-ed1-f51.google.com [209.85.208.51]) (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 BD8261B28D; Thu, 4 Jan 2024 10:01:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ed1-f51.google.com with SMTP id 4fb4d7f45d1cf-5570f246310so140588a12.0; Thu, 04 Jan 2024 02:01:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704362463; x=1704967263; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=8GB0K6qZx0zrh4wOwO3cUota9tes49aEfXI/3BFUe2E=; b=uhU/Mg8ZLGkhbQTzU6+UNwY6B97HIdyuAKs6Osxi+CishHgdLZUpY/s/Kc64vPNndX S1kh01MlKSJgOsBrouvdYEqefaOk15KT6Dg/AZOAi5CoULYLhkEJyWLa7nnOtjBXiSTw SS6RjRvBGi0JqmGwsjidI3B4ZBojrkFSCPf3Da92j76ELq4it1UCSKu8u+RbLHSeoqsa cSRB1+YaaU0zVT5x3HBRkjYvidp5RQqPm6ObP4I1bY7zarDLUdsid/AHXwrwAs3qSRCE XL1LRYH5PwvGF/8Dy3BA7Q1kfQdYrprp9iDLy3LD0jOzOmP3crhoJwITBElhjgRopgtd Tdog== X-Gm-Message-State: AOJu0YyBEQocbWLti5+8+PMJVkZe0ENjzsyy5fU2qpMJgi+8/Pt5PM6c NTXroHy1ePJcEpJZo6fqJEQ= X-Google-Smtp-Source: AGHT+IGjvlrpvxpGdqvKI6pU/xED0gs/zrXJ0SXIPkeujhOLk1Fr2e+e4PJdp/oh+sQSJFRciaazqw== X-Received: by 2002:a50:a45b:0:b0:553:2b8:c9ff with SMTP id v27-20020a50a45b000000b0055302b8c9ffmr218889edb.76.1704362462773; Thu, 04 Jan 2024 02:01:02 -0800 (PST) Received: from gmail.com (fwdproxy-cln-120.fbsv.net. [2a03:2880:31ff:78::face:b00c]) by smtp.gmail.com with ESMTPSA id en22-20020a056402529600b00553830eb2fcsm18446438edb.64.2024.01.04.02.01.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jan 2024 02:01:02 -0800 (PST) Date: Thu, 4 Jan 2024 02:01:00 -0800 From: Breno Leitao To: "Paul E. McKenney" Cc: Like Xu , Andi Kleen , Kan Liang , Luwei Kang , Peter Zijlstra , Paolo Bonzini , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Arnaldo Carvalho de Melo , Ingo Molnar , rbc@meta.com Subject: Re: [BUG] Guest OSes die simultaneously (bisected) Message-ID: References: <3d8f5987-e09c-4dd2-a9c0-8ba22c9e948a@paulmck-laptop> Precedence: bulk X-Mailing-List: linux-perf-users@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: <3d8f5987-e09c-4dd2-a9c0-8ba22c9e948a@paulmck-laptop> On Wed, Jan 03, 2024 at 02:22:23PM -0800, Paul E. McKenney wrote: > I was > therefore forced to bisect among the commits backported to the internal > v5.19-based kernel, which fingered the backported version of the patch > called out above. Just to add some context to these backport, this commit (c59a1f106f5c) was backported to the internal v5.19-based kernel in order to easily backport these two fixes. a16eb25b09c02a54c ("KVM: x86: Mask LVTPC when handling a PMI") 73554b29bd70546c1 ("KVM: x86/pmu: Synthesize at most one PMI per VM-exit") They are required to solve the softlockup problem reported here: https://lore.kernel.org/all/ZRwcpki67uhpAUKi@gmail.com/