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[23.128.96.35]) by mx.google.com with ESMTPS id c22-20020a056a00249600b0068a3a2984ccsi1586153pfv.236.2023.10.03.07.37.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Oct 2023 07:37:33 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20230601 header.b="DHY/802L"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id 676EB810AF60; Tue, 3 Oct 2023 07:37:28 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240156AbjJCOhQ (ORCPT + 99 others); Tue, 3 Oct 2023 10:37:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240148AbjJCOhN (ORCPT ); Tue, 3 Oct 2023 10:37:13 -0400 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06B2AB0 for ; Tue, 3 Oct 2023 07:37:05 -0700 (PDT) Received: by mail-ed1-x533.google.com with SMTP id 4fb4d7f45d1cf-536ef8a7dcdso14236a12.0 for ; Tue, 03 Oct 2023 07:37:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1696343823; x=1696948623; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=3H71Ddp0doyGgICoMWyxNf2GnEn07JdKBfrTYW/a2tY=; b=DHY/802L91Y3bsbXfEh4FN5smepxNvCcp0/hs4yiqKQB6i88Oo2ZeXqrQZDX3BlwfE 51tqquR1UvGRAiR3n6X/s2ZSxok+tB8MokJIqda8j8ARfuYJ15XAqL4wFuaS0ivAyHRk qOZ/OiSEGINuKHTFYUdqOSWWufiyOcWQTFcVCIeESWc0kPHDIwk35IV/tR5YokRSci2y 5xLuOwiRuYGfIOOnf3XUNdEEIKaxYwMr3Nyqgxyw9swii7lPxWV0FcAyDO1zso5YnMts hacaY6IkFSkOd/GNdAgj7Zfvve4BD1IdYptjoz3DCjQxZ/l314z6Sau0FVIMjm/Y0szA UVvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696343823; x=1696948623; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=3H71Ddp0doyGgICoMWyxNf2GnEn07JdKBfrTYW/a2tY=; b=VCPlIApDRd9Ujx0usw5/Viwc+rkBlJU/kq9CEFxNOD0RDJP98i1iT6IPw8J7rXS3WJ BgVc0RWeEnsmTqYDFcRx/4PBc70HVqkrjFLPTPPrlUzYyUVO9gXJODAePk6ul17iUfAY A44Om4+4IqZCrZl8Jo7L3VrM6NuNjAWUa36TZvFNpRksLNkdAkRK1XZepg9JIP+8R5l/ mZEPNyNde2MWYS4maUU7z5HnKuDUtswZpBAr3cV/LAJmE8CJ6du2Ri2unaXPAE9X8Axa /UovO83u6PdEgjsY67g6478KASj3qV09/VYK4uixYFEhDEZES2qkC2CPVX1Xc3AuYOuN uUFA== X-Gm-Message-State: AOJu0Yz8IpOKwN8ymSjqRWEgsiN7dpdk3do3OOFc8ZvNb+87+8nYChLI dQybLnzlV4+8MrmBO6aV0SUDQOTsWgr/YnagqSWDxQ== X-Received: by 2002:a50:d09e:0:b0:52f:2f32:e76c with SMTP id v30-20020a50d09e000000b0052f2f32e76cmr137455edd.2.1696343823200; Tue, 03 Oct 2023 07:37:03 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Jim Mattson Date: Tue, 3 Oct 2023 07:36:48 -0700 Message-ID: Subject: Re: kvm/x86: perf: Softlockup issue To: Breno Leitao Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, rcu@vger.kernel.org, rbc@meta.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-8.4 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Tue, 03 Oct 2023 07:37:28 -0700 (PDT) On Tue, Oct 3, 2023 at 6:52=E2=80=AFAM Breno Leitao wro= te: > > I've been pursuing a bug in a virtual machine (KVM) that I would like to = share > in here. The VM gets stuck when running perf in a VM and getting soft loc= kups. > > The bug happens upstream (Linux 6.6-rc4 - 8a749fd1a8720d461). The same ke= rnel > is being used in the host and in the guest. Have you tried https://lore.kernel.org/kvm/169567819674.170423.438485398062= 9356216.b4-ty@google.com/?