Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756398AbcCQRJ5 (ORCPT ); Thu, 17 Mar 2016 13:09:57 -0400 Received: from torres.zugschlus.de ([85.214.131.164]:43088 "EHLO torres.zugschlus.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751966AbcCQRJz (ORCPT ); Thu, 17 Mar 2016 13:09:55 -0400 X-Greylist: delayed 917 seconds by postgrey-1.27 at vger.kernel.org; Thu, 17 Mar 2016 13:09:54 EDT Date: Thu, 17 Mar 2016 17:54:35 +0100 From: Marc Haber To: linux-kernel@vger.kernel.org Subject: Major KVM issues with kernel 4.5 on the host Message-ID: <20160317165435.GB3022@torres.zugschlus.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2832 Lines: 48 Hi, I have a (semi-productive[1]) system ("host") running Debian unstable. On this system, a few VMs (Debian unstable, Debian testing) ("vm1", "vm2", "vm3") are running. I roll my own kernels and take vanilla upstream sources. No distribution patches. Since host was updated to Kernel 4.5, the VMs have started acting up. All of them. The range of strangeness begins with "relocation error, system halted" on system startup, corrupted data files on disk, filesystems remounted read-only, libraries rejected with "invalid ELF format", binaries segfaulting all of a sudden. Downgrading host to kernel 4.4.5 magically fixed all those issues. Going back to 4.5 lets the issues reappear. Here, for example, ext4 fs errors, logged in one of the VMs: Mar 17 17:39:57 spinturn kernel: EXT4-fs error (device dm-0): ext4_lookup:1602: inode #415065: comm aide: deleted inode referenced: 546538 Mar 17 17:39:57 spinturn kernel: EXT4-fs error (device dm-0): ext4_lookup:1602: inode #415065: comm aide: deleted inode referenced: 546530 Mar 17 17:39:57 spinturn kernel: EXT4-fs error (device dm-0): ext4_iget:4269: inode #546543: comm aide: bad extra_isize (44800 != 256) Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_iget:4466: inode #546568: comm aide: bogus i_mode (144) Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_lookup:1602: inode #546548: comm aide: deleted inode referenced: 546564 Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_lookup:1602: inode #546548: comm aide: deleted inode referenced: 546562 Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_iget:4269: inode #546563: comm aide: bad extra_isize (6464 != 256) Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_iget:4466: inode #546561: comm aide: bogus i_mode (0) Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_iget:4269: inode #546529: comm aide: bad extra_isize (1152 != 256) Mar 17 17:39:58 spinturn kernel: EXT4-fs error (device dm-0): ext4_xattr_block_get:297: inode #546359: comm aide: bad block 677784 I'm going to try reproducing the issue on a less "important" machine so that bisecting is less painful, but maybe you guys have an idea what's going wrong here. jftr, kernel 4.5 in guest and in standalone systems seems to be unproblematic. Greetings Marc [1] my main workstation, running enough services for the local network that disturbances in its operation cause reasonable discomfort, but not the Enterprise kind of "productive" -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402 Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421