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=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 1DCB0C82675 for ; Mon, 16 Nov 2020 12:37:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CDF7920855 for ; Mon, 16 Nov 2020 12:37:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729745AbgKPLVe convert rfc822-to-8bit (ORCPT ); Mon, 16 Nov 2020 06:21:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:58628 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728857AbgKPLVe (ORCPT ); Mon, 16 Nov 2020 06:21:34 -0500 From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 209253] Loss of connectivity on guest after important host <-> guest traffic Date: Mon, 16 Nov 2020 11:21:32 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed 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: maironire@gmail.com 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: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT 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=209253 Mair O'Nire (maironire@gmail.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |maironire@gmail.com --- Comment #23 from Mair O'Nire (maironire@gmail.com) --- Hi all. I'm new here, registered exactly to track this bug. I've got a new laptop recently, HP Omen 2020, with AMD Ryzen 4800H and Nvidia 1660Ti, and whilst was trying to setup kvm virtualized system I ran into the same issue. During investigation I've found Ian's report, and then this one, too. Backtraces were very similar to other posted above, all at fs/eventfd.c:74, but sometimes with different origin. So I decided to give Alex's patch a try, and built mainline kernel with this patch applied. Mine host kernel was 5.8.[6,17,18], Fedora 33, and they all seems to be affected. Guest is Windows 10. So, I do confirm - patch works, system became stable, and there was no crashes for about a week, nor under regular work load, neither while running benchmarks. Before the fix guest uptime varied from 2 to 10 minutes and then crash. Moreover, I had to reboot host to get Nvidia back to work in vm again. Thanks Alex, Ian, and others, you guys doin' a great work if you don't know this already :) -- You are receiving this mail because: You are watching the assignee of the bug.