From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0772C433ED for ; Tue, 27 Apr 2021 16:57:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F4DB611BE for ; Tue, 27 Apr 2021 16:57:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237984AbhD0Q6I (ORCPT ); Tue, 27 Apr 2021 12:58:08 -0400 Received: from mail.kernel.org ([198.145.29.99]:43850 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237993AbhD0Q6D (ORCPT ); Tue, 27 Apr 2021 12:58:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPS id 48FA36105A for ; Tue, 27 Apr 2021 16:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619542639; bh=yKa+ob5V75yry2sndfvZzrSoade7VNgZQo+US3sqfgY=; h=From:To:Subject:Date:From; b=KQPb+b8fUCNMR4UpgKYbtLIurAAWWglJwlazWPQt5EeFKI2N978aWfJhjJ4XPFRP+ 2SUWtghBtNMzlGzwO+UebJBct/uer7tykVotSSpdw8JnVKvhUHBu32/rdNdJSh6dWC rMd+om7jV6vsW5aMBm2zxpSjznRM2+5YHESvzZV3/4sFssR2BhP4unKiWl5BMox4D9 r/OAWVKH3fRfxCd1Cz9Rz5YnQP6FmzqvabHNp35I3x1V4XOrc6ek88GAS+HXVZBbr9 udFDOyjfnKiglOdERqm2ISqOESb1bUTtYxZPeP4qNBp5clBVEWMoTAwwI79gsuZR4Z JeHWKVUC6OvHQ== From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 212859] New: Nested virtualization does not work well Date: Tue, 27 Apr 2021 16:57:18 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: ne-vlezay80@yandex.ru X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version cf_kernel_version rep_platform op_sys cf_tree bug_status bug_severity priority component assigned_to reporter cf_regression Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D212859 Bug ID: 212859 Summary: Nested virtualization does not work well Product: Virtualization Version: unspecified Kernel Version: 4.19.188-amd64-cust1 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@kernel-bugs.osdl.org Reporter: ne-vlezay80@yandex.ru Regression: No Qemu version: 2.8.1 System: Devuan Ascii Problem: If you try to use nested virtualization and run linux or openbsd on it, then the system inside the nested virtual machine periodically freezes. If you w= atch strace, there are a lot of timeouts during the hangup. But, if you use a ke= rnel from 5.10+ and qemu 5.20 on the host, then everything is fine. Nested virtualization works fine. Also run kernel 4.19.* on qemu, problem is not appers. Demonstration: https://youtu.be/mrMPukeTntQ --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=