From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikola Ciprich Subject: 4.14.x host - KVM guests crashing Date: Fri, 9 Feb 2018 14:16:00 +0100 Message-ID: <20180209131600.GC14309@pcnci.linuxbox.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: nik@linuxbox.cz To: kvm@vger.kernel.org Return-path: Received: from gwu.lbox.cz ([62.245.111.132]:35180 "EHLO gwu.lbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750997AbeBINQC (ORCPT ); Fri, 9 Feb 2018 08:16:02 -0500 Received: from linuxbox.linuxbox.cz (linuxbox.linuxbox.cz [10.76.66.10]) by gwu.lbox.cz (Sendmail) with ESMTPS id w19DG0qq030388 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Fri, 9 Feb 2018 14:16:00 +0100 Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: Hi, I just wanted to report, since we started rolling to 4.14.x kernels, we've experienced multiple KVM guest panics (with 4.14 on hosts) We've first hit it with 4.14.12, yesterday I had similar problem with 4.14.16. backtraces can be observed here: http://nik.lbox.cz/download/guest-panic-host-4.14.12.png http://nik.lbox.cz/download/guest-panic-host-4.14.16.png sorry I don't have anything more complete they are a bit different, but there are some similarities (ie double_fault) also important to note, both are from different host systems. after reverting hosts to 4.4, crashes are gone. it takes quite long time (more then day) for crash to occur my question is, did anyone hit similar problem? Is this something known, maybe fixed in 4.14.17 or latest GIT? Can I provide some further debug info? BR nik -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28.rijna 168, 709 00 Ostrava tel.: +420 591 166 214 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz -------------------------------------