From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net ([212.227.17.20]:49972 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755314AbbCELsD convert rfc822-to-8bit (ORCPT ); Thu, 5 Mar 2015 06:48:03 -0500 Received: from wirrsal ([78.48.162.105]) by mail.gmx.com (mrgmx102) with ESMTPSA (Nemesis) id 0Lpxdr-1XryNS1qaN-00fm1S for ; Thu, 05 Mar 2015 12:48:01 +0100 Message-ID: <1425556080.32673.11.camel@gmx.de> Subject: Lock-ups, assertion failure in btrfsck, scrub reporting super=4 From: Tobias Getzner To: linux-btrfs@vger.kernel.org Date: Thu, 05 Mar 2015 12:48:00 +0100 Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org List-ID: Hello, I had been running kernel 3.19 for a few days now, when yesterday I started getting hard lock-ups all the time. These seemed to be correlated to some program activity, most likely to running Firefox. I downgraded back to 3.18.6, but the problem persisted, though now I only got soft lock-ups which I could (after SysRQ+REISUB) inspect in dmesg. dmesg info pointed me toward btrfs. For what it’s worth, I uploaded the full kernel logs to: http://a.pomf.se/zsywtk.xz These might seem noteworthy: > kernel BUG at fs/btrfs/ctree.h:2565! > kernel BUG at fs/btrfs/ctree.h:2501! > NMI watchdog: BUG: soft lockup + btrfs-related stack trace > WARNING: CPU: 2 PID: 7051 at fs/btrfs/scrub.c:2461 scrub_stripe 0xcb8/0x1080 [btrfs]() Since the lock-ups appeared predictably a few minutes after boot & launching Firefox, I tried running btrfsck (without --repair) to see whether something is wrong with the home volume (maybe due to the unclean shutdowns from earlier lock-ups). However, when running btrfsck, all I get is: > checking extents > cmds-check.c:4943: process_extent_item: Assertion `item_size != sizeof(*ei0)` failed. > btrfs check[0x41a7dc] > btrfs check[0x41d9af] > btrfs check[0x423751] > btrfs check[0x4241e9] > btrfs check[0x424de1] > btrfs check(cmd_check+0x14b5)[0x427f0b] > btrfs check(main+0x15d)[0x40997d] > /usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7f8ce834d800] > btrfs check(_start+0x29)[0x409539] Does this indicate any particular problems with the file system? In addition, I ran a full scrub. This finished with «scrubbed … with 0 errors», but it also reported: > error details: super=4 > corrected errors: 0, uncorrectable errors: 0, unverified errors: 0 I booted back into the graphical system, and when not running Firefox, I did not get any immediate lock-ups anymore. I’d welcome any advice on how to proceed, i.e., in how to resolve the lock-ups, and, if possible, in fixing potential problems with the file-system. Best regards, Tobias