From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mondschein.lichtvoll.de ([194.150.191.11]:36581 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751002AbaLZP7L convert rfc822-to-8bit (ORCPT ); Fri, 26 Dec 2014 10:59:11 -0500 Received: from merkaba.localnet (ppp-88-217-104-169.dynamic.mnet-online.de [88.217.104.169]) by mail.lichtvoll.de (Postfix) with ESMTPSA id 0BE909A for ; Fri, 26 Dec 2014 16:58:26 +0100 (CET) From: Martin Steigerwald To: linux-btrfs@vger.kernel.org Subject: Re: BTRFS free space handling still needs more work: Hangs again Date: Fri, 26 Dec 2014 16:59:09 +0100 Message-ID: <6794875.ElpGA7E3Vr@merkaba> In-Reply-To: <3738341.y7uRQFcLJH@merkaba> References: <3738341.y7uRQFcLJH@merkaba> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-btrfs-owner@vger.kernel.org List-ID: Am Freitag, 26. Dezember 2014, 14:37:36 schrieben Sie: > I have this on 3.18 kernel on Debian Sid with BTRFS Dual SSD RAID with > space_cache, skinny meta data extents – are these a problem? – and > compress=lzo: > > merkaba:~> btrfs fi sh /home > Label: 'home' uuid: b96c4f72-0523-45ac-a401-f7be73dd624a > Total devices 2 FS bytes used 144.41GiB > devid 1 size 160.00GiB used 160.00GiB path /dev/mapper/msata-home > devid 2 size 160.00GiB used 160.00GiB path /dev/mapper/sata-home > > Btrfs v3.17 > merkaba:~> btrfs fi df /home > Data, RAID1: total=154.97GiB, used=141.12GiB > System, RAID1: total=32.00MiB, used=48.00KiB > Metadata, RAID1: total=5.00GiB, used=3.29GiB > GlobalReserve, single: total=512.00MiB, used=0.00B > > > And I had hangs with BTRFS again. This time as I wanted to install tax > return software in Virtualbox´d Windows XP VM (which I use once a year > cause I know no tax return software for Linux which would be suitable for > Germany and I frankly don´t care about the end of security cause all > surfing and other network access I will do from the Linux box and I only > run the VM behind a firewall). These are 100% reproducable for me: 1) Have the compress=lzo, space_cache BTRFS RAID Dual SSD RAID 1 fill both with trees. 2) Have a Windows XP VM in Virtualbox on that BTRFS RAID 1 3) Press "Defragment" (in the hope to be able to use sdelete -c and then VBoxManage modifyhd Winlala.vdi --compact to reduce image size) Gives: One kworker thread using up 100% of a core for minutes with bursts of btrfs-transaction-process in between and: Dec 26 16:17:57 merkaba kernel: [ 8102.029438] mce: [Hardware Error]: Machine check events logged Dec 26 16:18:15 merkaba kernel: [ 8119.879230] CPU2: Core temperature above threshold, cpu clock throttled (total events = 54053) Dec 26 16:18:15 merkaba kernel: [ 8119.879232] CPU0: Package temperature above threshold, cpu clock throttled (total events = 89435) Dec 26 16:18:15 merkaba kernel: [ 8119.879234] CPU3: Core temperature above threshold, cpu clock throttled (total events = 54053) Dec 26 16:18:15 merkaba kernel: [ 8119.879235] CPU1: Package temperature above threshold, cpu clock throttled (total events = 89435) Dec 26 16:18:15 merkaba kernel: [ 8119.879237] CPU3: Package temperature above threshold, cpu clock throttled (total events = 89435) Dec 26 16:18:15 merkaba kernel: [ 8119.879245] CPU2: Package temperature above threshold, cpu clock throttled (total events = 89435) Dec 26 16:18:15 merkaba kernel: [ 8119.880218] CPU2: Core temperature/speed normal Dec 26 16:18:15 merkaba kernel: [ 8119.880219] CPU1: Package temperature/speed normal Dec 26 16:18:15 merkaba kernel: [ 8119.880220] CPU3: Core temperature/speed normal Dec 26 16:18:15 merkaba kernel: [ 8119.880221] CPU0: Package temperature/speed normal Dec 26 16:18:15 merkaba kernel: [ 8119.880223] CPU3: Package temperature/speed normal Dec 26 16:18:15 merkaba kernel: [ 8119.880228] CPU2: Package temperature/speed normal Dec 26 16:20:27 merkaba kernel: [ 8252.054015] mce: [Hardware Error]: Machine check events logged Dec 26 16:20:57 merkaba kernel: [ 8281.461874] INFO: task kded4:1959 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.464106] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.466361] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.468760] kded4 D ffff88040764ce98 0 1959 1 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.471112] ffff8803efa57bb8 0000000000000002 ffff8803efa57c00 ffff880407f261c0 Dec 26 16:20:57 merkaba kernel: [ 8281.473462] ffff8803efa57fd8 ffff88040764c950 0000000000012300 ffff88040764c950 Dec 26 16:20:57 merkaba kernel: [ 8281.475780] ffff8803efa57ba8 ffff8803eea9a900 ffff8803eea9a904 ffff88040764c950 Dec 26 16:20:57 merkaba kernel: [ 8281.478142] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.480414] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.482694] [] schedule_preempt_disabled+0x13/0x1f Dec 26 16:20:57 merkaba kernel: [ 8281.484979] [] __mutex_lock_slowpath+0xab/0x126 Dec 26 16:20:57 merkaba kernel: [ 8281.487271] [] ? lookup_fast+0x173/0x238 Dec 26 16:20:57 merkaba kernel: [ 8281.489534] [] mutex_lock+0x13/0x24 Dec 26 16:20:57 merkaba kernel: [ 8281.491811] [] walk_component+0x69/0x17e Dec 26 16:20:57 merkaba kernel: [ 8281.494092] [] lookup_last+0x2e/0x30 Dec 26 16:20:57 merkaba kernel: [ 8281.496416] [] path_lookupat+0x83/0x2d9 Dec 26 16:20:57 merkaba kernel: [ 8281.498733] [] ? debug_smp_processor_id+0x17/0x19 Dec 26 16:20:57 merkaba kernel: [ 8281.501074] [] ? getname_flags+0x31/0x134 Dec 26 16:20:57 merkaba kernel: [ 8281.503338] [] filename_lookup+0x25/0x7a Dec 26 16:20:57 merkaba kernel: [ 8281.505604] [] user_path_at_empty+0x55/0x93 Dec 26 16:20:57 merkaba kernel: [ 8281.507941] [] ? preempt_count_add+0x7c/0x90 Dec 26 16:20:57 merkaba kernel: [ 8281.510210] [] ? cpuacct_account_field+0x56/0x5f Dec 26 16:20:57 merkaba kernel: [ 8281.512499] [] ? cpuacct_account_field+0x56/0x5f Dec 26 16:20:57 merkaba kernel: [ 8281.514705] [] user_path_at+0xc/0xe Dec 26 16:20:57 merkaba kernel: [ 8281.517039] [] vfs_fstatat+0x49/0x84 Dec 26 16:20:57 merkaba kernel: [ 8281.519397] [] ? acct_account_cputime+0x17/0x19 Dec 26 16:20:57 merkaba kernel: [ 8281.521686] [] vfs_stat+0x16/0x18 Dec 26 16:20:57 merkaba kernel: [ 8281.524064] [] SYSC_newstat+0x15/0x2e Dec 26 16:20:57 merkaba kernel: [ 8281.526367] [] ? user_exit+0x13/0x15 Dec 26 16:20:57 merkaba kernel: [ 8281.528792] [] ? syscall_trace_enter_phase1+0x57/0x12a Dec 26 16:20:57 merkaba kernel: [ 8281.531120] [] ? syscall_trace_leave+0xcc/0x10a Dec 26 16:20:57 merkaba kernel: [ 8281.533577] [] ? int_check_syscall_exit_work+0x34/0x3d Dec 26 16:20:57 merkaba kernel: [ 8281.535977] [] SyS_newstat+0x9/0xb Dec 26 16:20:57 merkaba kernel: [ 8281.538416] [] system_call_fastpath+0x12/0x17 Dec 26 16:20:57 merkaba kernel: [ 8281.540835] INFO: task kactivitymanage:1994 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.540838] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.540838] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.540848] kactivitymanage D 0000000000000000 0 1994 1 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.540851] ffff8803e42efe58 0000000000000002 00000001ff68d6d6 ffff8800c285c950 Dec 26 16:20:57 merkaba kernel: [ 8281.540854] ffff8803e42effd8 ffff8803fda361c0 0000000000012300 ffff8803fda361c0 Dec 26 16:20:57 merkaba kernel: [ 8281.540857] 00000000000034e5 ffff8804059e0348 ffff8804059e034c ffff8803fda361c0 Dec 26 16:20:57 merkaba kernel: [ 8281.540858] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.540862] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.540865] [] schedule_preempt_disabled+0x13/0x1f Dec 26 16:20:57 merkaba kernel: [ 8281.540867] [] __mutex_lock_slowpath+0xab/0x126 Dec 26 16:20:57 merkaba kernel: [ 8281.540871] [] ? __fget+0x67/0x72 Dec 26 16:20:57 merkaba kernel: [ 8281.540873] [] mutex_lock+0x13/0x24 Dec 26 16:20:57 merkaba kernel: [ 8281.540876] [] __fdget_pos+0x36/0x3c Dec 26 16:20:57 merkaba kernel: [ 8281.540878] [] fdget_pos+0x9/0x15 Dec 26 16:20:57 merkaba kernel: [ 8281.540881] [] SyS_write+0x19/0x71 Dec 26 16:20:57 merkaba kernel: [ 8281.540884] [] ? int_check_syscall_exit_work+0x34/0x3d Dec 26 16:20:57 merkaba kernel: [ 8281.540886] [] system_call_fastpath+0x12/0x17 Dec 26 16:20:57 merkaba kernel: [ 8281.540890] INFO: task plasma-desktop:2013 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.540891] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.540892] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.540895] plasma-desktop D ffff8803fda39db8 0 2013 1 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.540898] ffff8803d947fbb8 0000000000000002 ffff8803d947fc00 ffffffff81a16500 Dec 26 16:20:57 merkaba kernel: [ 8281.540900] ffff8803d947ffd8 ffff8803fda39870 0000000000012300 ffff8803fda39870 Dec 26 16:20:57 merkaba kernel: [ 8281.540902] ffff8803d947fba8 ffff8803eea9a900 ffff8803eea9a904 ffff8803fda39870 Dec 26 16:20:57 merkaba kernel: [ 8281.540903] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.540906] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.540908] [] schedule_preempt_disabled+0x13/0x1f Dec 26 16:20:57 merkaba kernel: [ 8281.540910] [] __mutex_lock_slowpath+0xab/0x126 Dec 26 16:20:57 merkaba kernel: [ 8281.540913] [] ? lookup_fast+0x173/0x238 Dec 26 16:20:57 merkaba kernel: [ 8281.540916] [] mutex_lock+0x13/0x24 Dec 26 16:20:57 merkaba kernel: [ 8281.540918] [] walk_component+0x69/0x17e Dec 26 16:20:57 merkaba kernel: [ 8281.540921] [] ? __sock_recvmsg_nosec+0x29/0x2b Dec 26 16:20:57 merkaba kernel: [ 8281.540924] [] lookup_last+0x2e/0x30 Dec 26 16:20:57 merkaba kernel: [ 8281.540926] [] path_lookupat+0x83/0x2d9 Dec 26 16:20:57 merkaba kernel: [ 8281.540929] [] ? debug_smp_processor_id+0x17/0x19 Dec 26 16:20:57 merkaba kernel: [ 8281.540932] [] ? getname_flags+0x31/0x134 Dec 26 16:20:57 merkaba kernel: [ 8281.540934] [] filename_lookup+0x25/0x7a Dec 26 16:20:57 merkaba kernel: [ 8281.540937] [] user_path_at_empty+0x55/0x93 Dec 26 16:20:57 merkaba kernel: [ 8281.540942] [] ? preempt_count_add+0x7c/0x90 Dec 26 16:20:57 merkaba kernel: [ 8281.540947] [] ? cpuacct_account_field+0x56/0x5f Dec 26 16:20:57 merkaba kernel: [ 8281.540949] [] ? cpuacct_account_field+0x56/0x5f Dec 26 16:20:57 merkaba kernel: [ 8281.540952] [] user_path_at+0xc/0xe Dec 26 16:20:57 merkaba kernel: [ 8281.540956] [] user_statfs+0x2b/0x68 Dec 26 16:20:57 merkaba kernel: [ 8281.540960] [] ? acct_account_cputime+0x17/0x19 Dec 26 16:20:57 merkaba kernel: [ 8281.540963] [] SYSC_statfs+0x1b/0x3a Dec 26 16:20:57 merkaba kernel: [ 8281.540965] [] ? user_exit+0x13/0x15 Dec 26 16:20:57 merkaba kernel: [ 8281.540968] [] ? syscall_trace_enter_phase1+0x57/0x12a Dec 26 16:20:57 merkaba kernel: [ 8281.540970] [] ? syscall_trace_leave+0xcc/0x10a Dec 26 16:20:57 merkaba kernel: [ 8281.540973] [] ? int_check_syscall_exit_work+0x34/0x3d Dec 26 16:20:57 merkaba kernel: [ 8281.540976] [] SyS_statfs+0x9/0xb Dec 26 16:20:57 merkaba kernel: [ 8281.540978] [] system_call_fastpath+0x12/0x17 Dec 26 16:20:57 merkaba kernel: [ 8281.540983] INFO: task krunner:2050 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.540984] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.540985] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.540988] krunner D 0000000000000000 0 2050 1 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.540991] ffff8803cb68be58 0000000000000002 ffff8803cb68be28 ffff8803fda39870 Dec 26 16:20:57 merkaba kernel: [ 8281.540993] ffff8803cb68bfd8 ffff8800cecee1c0 0000000000012300 ffff8800cecee1c0 Dec 26 16:20:57 merkaba kernel: [ 8281.540995] 00000000000089ef ffff8804059e0348 ffff8804059e034c ffff8800cecee1c0 Dec 26 16:20:57 merkaba kernel: [ 8281.540996] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.540998] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.541001] [] schedule_preempt_disabled+0x13/0x1f Dec 26 16:20:57 merkaba kernel: [ 8281.541003] [] __mutex_lock_slowpath+0xab/0x126 Dec 26 16:20:57 merkaba kernel: [ 8281.541005] [] ? __fget+0x67/0x72 Dec 26 16:20:57 merkaba kernel: [ 8281.541008] [] mutex_lock+0x13/0x24 Dec 26 16:20:57 merkaba kernel: [ 8281.541010] [] __fdget_pos+0x36/0x3c Dec 26 16:20:57 merkaba kernel: [ 8281.541012] [] fdget_pos+0x9/0x15 Dec 26 16:20:57 merkaba kernel: [ 8281.541014] [] SyS_write+0x19/0x71 Dec 26 16:20:57 merkaba kernel: [ 8281.541017] [] ? int_check_syscall_exit_work+0x34/0x3d Dec 26 16:20:57 merkaba kernel: [ 8281.541019] [] system_call_fastpath+0x12/0x17 Dec 26 16:20:57 merkaba kernel: [ 8281.541035] INFO: task akonadi_baloo_i:2273 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.541036] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.541036] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.541039] akonadi_baloo_i D ffff8803b773b628 0 2273 2170 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.541041] ffff8803ac8ff948 0000000000000002 ffff88040d80dc00 ffffffff81a16500 Dec 26 16:20:57 merkaba kernel: [ 8281.541043] ffff8803ac8fffd8 ffff8803b773b0e0 0000000000012300 ffff8803b773b0e0 Dec 26 16:20:57 merkaba kernel: [ 8281.541046] ffff8803ac8ff928 7fffffffffffffff ffff8803ac8ffa80 0000000000000002 Dec 26 16:20:57 merkaba kernel: [ 8281.541046] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.541049] [] ? console_conditional_schedule+0x14/0x14 Dec 26 16:20:57 merkaba kernel: [ 8281.541051] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.541054] [] schedule_timeout+0x20/0xf5 Dec 26 16:20:57 merkaba kernel: [ 8281.541056] [] ? get_parent_ip+0xe/0x3e Dec 26 16:20:57 merkaba kernel: [ 8281.541058] [] ? preempt_count_add+0x7c/0x90 Dec 26 16:20:57 merkaba kernel: [ 8281.541061] [] ? _raw_spin_lock_irq+0x1c/0x20 Dec 26 16:20:57 merkaba kernel: [ 8281.541063] [] __wait_for_common+0x11e/0x163 Dec 26 16:20:57 merkaba kernel: [ 8281.541066] [] ? wake_up_state+0xd/0xd Dec 26 16:20:57 merkaba kernel: [ 8281.541069] [] wait_for_completion+0x1f/0x21 Dec 26 16:20:57 merkaba kernel: [ 8281.541072] [] writeback_inodes_sb_nr+0x8c/0x95 Dec 26 16:20:57 merkaba kernel: [ 8281.541077] [] ? perf_trace_workqueue_work+0x8e/0x95 Dec 26 16:20:57 merkaba kernel: [ 8281.541115] [] flush_space+0x200/0x426 [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541135] [] ? can_overcommit+0xaa/0xec [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541160] [] reserve_metadata_bytes+0x274/0x368 [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541164] [] ? get_parent_ip+0xe/0x3e Dec 26 16:20:57 merkaba kernel: [ 8281.541166] [] ? preempt_count_add+0x7c/0x90 Dec 26 16:20:57 merkaba kernel: [ 8281.541185] [] btrfs_delalloc_reserve_metadata+0x100/0x32c [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541215] [] __btrfs_buffered_write+0x1be/0x4a4 [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541218] [] ? kmap_atomic+0x13/0x39 Dec 26 16:20:57 merkaba kernel: [ 8281.541220] [] ? pagefault_enable+0xe/0x21 Dec 26 16:20:57 merkaba kernel: [ 8281.541242] [] btrfs_file_write_iter+0x303/0x40e [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541245] [] new_sync_write+0x77/0x9b Dec 26 16:20:57 merkaba kernel: [ 8281.541247] [] vfs_write+0xad/0x112 Dec 26 16:20:57 merkaba kernel: [ 8281.541250] [] SyS_pwrite64+0x5f/0x7d Dec 26 16:20:57 merkaba kernel: [ 8281.541253] [] ? int_check_syscall_exit_work+0x34/0x3d Dec 26 16:20:57 merkaba kernel: [ 8281.541256] [] system_call_fastpath+0x12/0x17 Dec 26 16:20:57 merkaba kernel: [ 8281.541263] INFO: task kworker/u8:1:3336 blocked for more than 120 seconds. Dec 26 16:20:57 merkaba kernel: [ 8281.541264] Tainted: G O 3.18.0-tp520 #14 Dec 26 16:20:57 merkaba kernel: [ 8281.541265] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Dec 26 16:20:57 merkaba kernel: [ 8281.541268] kworker/u8:1 D 0000000000000000 0 3336 2 0x00000000 Dec 26 16:20:57 merkaba kernel: [ 8281.541285] Workqueue: events_unbound btrfs_async_reclaim_metadata_space [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541288] ffff880332d6bb78 0000000000000002 ffff88040d80dc00 ffff8803b773b0e0 Dec 26 16:20:57 merkaba kernel: [ 8281.541290] ffff880332d6bfd8 ffff8800c2804950 0000000000012300 ffff8800c2804950 Dec 26 16:20:57 merkaba kernel: [ 8281.541292] ffff880332d6bb58 7fffffffffffffff ffff880332d6bcb0 0000000000000002 Dec 26 16:20:57 merkaba kernel: [ 8281.541293] Call Trace: Dec 26 16:20:57 merkaba kernel: [ 8281.541299] [] ? console_conditional_schedule+0x14/0x14 Dec 26 16:20:57 merkaba kernel: [ 8281.541301] [] schedule+0x64/0x66 Dec 26 16:20:57 merkaba kernel: [ 8281.541303] [] schedule_timeout+0x20/0xf5 Dec 26 16:20:57 merkaba kernel: [ 8281.541306] [] ? get_parent_ip+0xe/0x3e Dec 26 16:20:57 merkaba kernel: [ 8281.541308] [] ? preempt_count_add+0x7c/0x90 Dec 26 16:20:57 merkaba kernel: [ 8281.541311] [] ? _raw_spin_lock_irq+0x1c/0x20 Dec 26 16:20:57 merkaba kernel: [ 8281.541313] [] __wait_for_common+0x11e/0x163 Dec 26 16:20:57 merkaba kernel: [ 8281.541317] [] ? wake_up_state+0xd/0xd Dec 26 16:20:57 merkaba kernel: [ 8281.541320] [] wait_for_completion+0x1f/0x21 Dec 26 16:20:57 merkaba kernel: [ 8281.541322] [] writeback_inodes_sb_nr+0x8c/0x95 Dec 26 16:20:57 merkaba kernel: [ 8281.541324] [] ? perf_trace_workqueue_work+0x8e/0x95 Dec 26 16:20:57 merkaba kernel: [ 8281.541343] [] flush_space+0x200/0x426 [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541346] [] ? _raw_spin_lock+0x1b/0x1f Dec 26 16:20:57 merkaba kernel: [ 8281.541348] [] ? _raw_spin_unlock+0x11/0x24 Dec 26 16:20:57 merkaba kernel: [ 8281.541366] [] btrfs_async_reclaim_metadata_space+0x114/0x160 [btrfs] Dec 26 16:20:57 merkaba kernel: [ 8281.541368] [] process_one_work+0x15e/0x2a9 Dec 26 16:20:57 merkaba kernel: [ 8281.541371] [] worker_thread+0x1f6/0x2a3 Dec 26 16:20:57 merkaba kernel: [ 8281.541374] [] ? rescuer_thread+0x214/0x214 Dec 26 16:20:57 merkaba kernel: [ 8281.541376] [] kthread+0xb2/0xba Dec 26 16:20:57 merkaba kernel: [ 8281.541379] [] ? dcbnl_newmsg+0x14/0xa8 Dec 26 16:20:57 merkaba kernel: [ 8281.541381] [] ? __kthread_parkme+0x62/0x62 Dec 26 16:20:57 merkaba kernel: [ 8281.541384] [] ret_from_fork+0x7c/0xb0 Dec 26 16:20:57 merkaba kernel: [ 8281.541386] [] ? __kthread_parkme+0x62/0x62 Dec 26 16:21:24 merkaba kernel: [ 8308.678889] device eth0 left promiscuous mode Dec 26 16:21:24 merkaba kernel: [ 8308.700212] vboxnetflt: 0 out of 34916 packets were not sent (directed to host) which translates to: Desktop unusable => hard reboot. I know resized it from 160GiB to 170 GiB on both devices. But I think I will consider moving the VM image to another filesystem. But at least my description can give an idea on how to reproduce this behaviour. Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7