From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from torres.zugschlus.de ([85.214.131.164]:34568 "EHLO torres.zugschlus.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755580AbcCNMHF convert rfc822-to-8bit (ORCPT ); Mon, 14 Mar 2016 08:07:05 -0400 Received: from mh by torres.zugschlus.de with local (Exim 4.84) (envelope-from ) id 1afRH5-0001uq-Qx for linux-btrfs@vger.kernel.org; Mon, 14 Mar 2016 13:07:03 +0100 Date: Mon, 14 Mar 2016 13:07:03 +0100 From: Marc Haber To: Btrfs BTRFS Subject: Re: New file system with same issue (was: Again, no space left on device while rebalancing and recipe doesnt work) Message-ID: <20160314120703.GD2334@torres.zugschlus.de> References: <20160227211450.GS26042@torres.zugschlus.de> <20160305143934.GE1902@torres.zugschlus.de> <20160313115809.GQ2334@torres.zugschlus.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <20160313115809.GQ2334@torres.zugschlus.de> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Sun, Mar 13, 2016 at 12:58:09PM +0100, Marc Haber wrote: > On Sat, Mar 05, 2016 at 12:34:09PM -0700, Chris Murphy wrote: > > The alternative if this can't be fixed, is to recreate the filesystem > > because there's no practical way yet to migrate so many snapshots to a > > new file system. > > I recreated the file system on March 7, with 200 GiB in size, using > btrfs-tools 4.4. The snapshot-taking process has been running since > then, but I also regularly cleaned up. The number of snapshots on the > new filesystem has never exceeded 1000, with the current count being > at 148. > > And btrfs balance runs into the same ENOSPC issues as the old one: ... with Qu's patch, I now get a reproducible kernel trace: Mar 14 10:23:49 fan mh: BEGIN btrfs-balance script Mar 14 10:23:49 fan mh: btrfs fi df / Mar 14 10:23:49 fan root: Data, single: total=79.00GiB, used=78.42GiB Mar 14 10:23:49 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 10:23:49 fan root: Metadata, single: total=10.00GiB, used=2.46GiB Mar 14 10:23:49 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 10:23:49 fan mh: btrfs fi show / Mar 14 10:23:49 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 10:23:49 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 10:23:49 fan root: #011devid 1 size 200.00GiB used 89.03GiB path /dev/mapper/fanbtr Mar 14 10:23:49 fan root: Mar 14 10:23:49 fan mh: btrfs fi usage / Mar 14 10:23:49 fan root: Overall: Mar 14 10:23:49 fan root: Device size:#011#011 200.00GiB Mar 14 10:23:49 fan root: Device allocated:#011#011 89.03GiB Mar 14 10:23:49 fan root: Device unallocated:#011#011 110.97GiB Mar 14 10:23:49 fan root: Device missing:#011#011 0.00B Mar 14 10:23:49 fan root: Used:#011#011#011 80.89GiB Mar 14 10:23:49 fan root: Free (estimated):#011#011 111.54GiB#011(min: 111.54GiB) Mar 14 10:23:49 fan root: Data ratio:#011#011#011 1.00 Mar 14 10:23:49 fan root: Metadata ratio:#011#011 1.00 Mar 14 10:23:49 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 10:23:49 fan root: Mar 14 10:23:49 fan root: Data,single: Size:79.00GiB, Used:78.42GiB Mar 14 10:23:49 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 10:23:49 fan root: Mar 14 10:23:49 fan root: Metadata,single: Size:10.00GiB, Used:2.46GiB Mar 14 10:23:49 fan root: /dev/mapper/fanbtr#011 10.00GiB Mar 14 10:23:49 fan root: Mar 14 10:23:49 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 10:23:49 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 10:23:49 fan root: Mar 14 10:23:49 fan root: Unallocated: Mar 14 10:23:49 fan root: /dev/mapper/fanbtr#011 110.97GiB Mar 14 10:23:49 fan mh: BEGIN btrfs balance start / Mar 14 10:36:46 fan kernel: [ 890.995815] BTRFS info (device dm-15): 6 enospc errors during balance Mar 14 10:36:46 fan root: ERROR: error during balancing '/': No space left on device Mar 14 10:36:46 fan root: There may be more info in syslog - try dmesg | tail Mar 14 10:36:46 fan root: btrfs fi df / Mar 14 10:36:46 fan root: Data, single: total=79.00GiB, used=78.42GiB Mar 14 10:36:46 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 10:36:46 fan root: Metadata, single: total=12.00GiB, used=2.46GiB Mar 14 10:36:46 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 10:36:46 fan root: btrfs fi show / Mar 14 10:36:46 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 10:36:46 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 10:36:46 fan root: #011devid 1 size 200.00GiB used 91.03GiB path /dev/mapper/fanbtr Mar 14 10:36:46 fan root: Mar 14 10:36:46 fan root: btrfs fi usage / Mar 14 10:36:46 fan root: Overall: Mar 14 10:36:46 fan root: Device size:#011#011 200.00GiB Mar 14 10:36:46 fan root: Device allocated:#011#011 91.03GiB Mar 14 10:36:46 fan root: Device unallocated:#011#011 108.97GiB Mar 14 10:36:46 fan root: Device missing:#011#011 0.00B Mar 14 10:36:46 fan root: Used:#011#011#011 80.89GiB Mar 14 10:36:46 fan root: Free (estimated):#011#011 109.54GiB#011(min: 109.54GiB) Mar 14 10:36:46 fan root: Data ratio:#011#011#011 1.00 Mar 14 10:36:46 fan root: Metadata ratio:#011#011 1.00 Mar 14 10:36:46 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 10:36:46 fan root: Mar 14 10:36:46 fan root: Data,single: Size:79.00GiB, Used:78.42GiB Mar 14 10:36:46 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 10:36:46 fan root: Mar 14 10:36:46 fan root: Metadata,single: Size:12.00GiB, Used:2.46GiB Mar 14 10:36:46 fan root: /dev/mapper/fanbtr#011 12.00GiB Mar 14 10:36:46 fan root: Mar 14 10:36:46 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 10:36:46 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 10:36:46 fan root: Mar 14 10:36:46 fan root: Unallocated: Mar 14 10:36:46 fan root: /dev/mapper/fanbtr#011 108.97GiB Mar 14 10:36:46 fan root: BEGIN btrfs balance start -dprofiles=single / Mar 14 10:48:16 fan kernel: [ 1581.228727] ------------[ cut here ]------------ Mar 14 10:48:16 fan kernel: [ 1581.228794] WARNING: CPU: 1 PID: 121 at fs/btrfs/extent-tree.c:7897 btrfs_alloc_tree_block+0xeb/0x3d6 [btrfs]() Mar 14 10:48:16 fan kernel: [ 1581.228800] BTRFS: block rsv returned -28 Mar 14 10:48:16 fan kernel: [ 1581.228804] Modules linked in: iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp dummy ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative bridge stp llc snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi amd64_edac_mod edac_mce_amd kvm_amd input_leds pcspkr edac_core snd_hda_intel kvm snd_cmipci snd_hda_codec snd_mpu401_uart snd_opl3_lib snd_rawmidi snd_hda_core snd_seq_device irqbypass k10temp snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_timer evdev snd asus_atk0110 soundcore acpi_cpufreq i2c_piix4 tpm_tis sg tpm processor shpchp hwmon_vid autofs4 crc32c_generic btrfs xor raid6_pq ext4 crc16 mbcache jbd2 hmac sha256_ssse3 sha256_generic drbg ansi_cprng xts gf128mul algif_skcipher af_alg dm_crypt dm_mod hid_generic usbhid hid usb_storage sr_mod sd_mod cdrom ohci_pci ahci libahci amdkfd r8169 mii radeon xhci_pci i2c_algo_bit xhci_hcd ttm sym53c8xx ehci_pci scsi_transport_spi ohci_hcd drm_kms_helper libata ehci_hcd drm usbcore scsi_mod usb_common i2c_core button Mar 14 10:48:16 fan kernel: [ 1581.228957] CPU: 1 PID: 121 Comm: kworker/u16:2 Not tainted 4.4.5-zgws1 #2 Mar 14 10:48:16 fan kernel: [ 1581.228963] Hardware name: System manufacturer System Product Name/M5A88-V EVO, BIOS 1603 10/12/2012 Mar 14 10:48:16 fan kernel: [ 1581.229012] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229018] 0000000000000000 ffffffff811dd418 ffff880613aafb58 0000000000000009 Mar 14 10:48:16 fan kernel: [ 1581.229026] ffffffff81051e21 ffffffffa047d29f ffff8804350d6800 ffff880613aafbb0 Mar 14 10:48:16 fan kernel: [ 1581.229033] ffff880610322000 ffff880531466700 ffffffff81051e79 ffffffffa04f065b Mar 14 10:48:16 fan kernel: [ 1581.229039] Call Trace: Mar 14 10:48:16 fan kernel: [ 1581.229052] [] ? dump_stack+0x5a/0x6f Mar 14 10:48:16 fan kernel: [ 1581.229061] [] ? warn_slowpath_common+0x8e/0xa3 Mar 14 10:48:16 fan kernel: [ 1581.229104] [] ? btrfs_alloc_tree_block+0xeb/0x3d6 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229112] [] ? warn_slowpath_fmt+0x43/0x4b Mar 14 10:48:16 fan kernel: [ 1581.229155] [] ? btrfs_alloc_tree_block+0xeb/0x3d6 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229194] [] ? btrfs_copy_root+0x9e/0x1c1 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229239] [] ? create_reloc_root+0x6c/0x196 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229285] [] ? btrfs_init_reloc_root+0x71/0x9a [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229329] [] ? record_root_in_trans+0xc8/0xd5 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229374] [] ? btrfs_record_root_in_trans+0x42/0x5a [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229418] [] ? start_transaction+0x2de/0x455 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229464] [] ? btrfs_finish_ordered_io+0x1e2/0x4d7 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229474] [] ? pick_next_task_fair+0x1f8/0x357 Mar 14 10:48:16 fan kernel: [ 1581.229482] [] ? account_entity_dequeue+0x46/0x67 Mar 14 10:48:16 fan kernel: [ 1581.229529] [] ? btrfs_scrubparity_helper+0xf4/0x233 [btrfs] Mar 14 10:48:16 fan kernel: [ 1581.229538] [] ? process_one_work+0x178/0x27b Mar 14 10:48:16 fan kernel: [ 1581.229545] [] ? worker_thread+0x1da/0x280 Mar 14 10:48:16 fan kernel: [ 1581.229553] [] ? rescuer_thread+0x284/0x284 Mar 14 10:48:16 fan kernel: [ 1581.229559] [] ? kthread+0x95/0x9d Mar 14 10:48:16 fan kernel: [ 1581.229566] [] ? kthread_parkme+0x16/0x16 Mar 14 10:48:16 fan kernel: [ 1581.229574] [] ? ret_from_fork+0x3f/0x70 Mar 14 10:48:16 fan kernel: [ 1581.229580] [] ? kthread_parkme+0x16/0x16 Mar 14 10:48:16 fan kernel: [ 1581.229586] ---[ end trace 69a5cc7238dc3665 ]--- Mar 14 10:51:06 fan root: Done, had to relocate 79 out of 92 chunks Mar 14 10:51:06 fan root: btrfs fi df / Mar 14 10:51:06 fan root: Data, single: total=79.00GiB, used=78.43GiB Mar 14 10:51:06 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 10:51:06 fan root: Metadata, single: total=12.00GiB, used=2.46GiB Mar 14 10:51:06 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 10:51:06 fan root: btrfs fi show / Mar 14 10:51:06 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 10:51:06 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 10:51:06 fan root: #011devid 1 size 200.00GiB used 91.03GiB path /dev/mapper/fanbtr Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: btrfs fi usage / Mar 14 10:51:06 fan root: Overall: Mar 14 10:51:06 fan root: Device size:#011#011 200.00GiB Mar 14 10:51:06 fan root: Device allocated:#011#011 91.03GiB Mar 14 10:51:06 fan root: Device unallocated:#011#011 108.97GiB Mar 14 10:51:06 fan root: Device missing:#011#011 0.00B Mar 14 10:51:06 fan root: Used:#011#011#011 80.89GiB Mar 14 10:51:06 fan root: Free (estimated):#011#011 109.54GiB#011(min: 109.54GiB) Mar 14 10:51:06 fan root: Data ratio:#011#011#011 1.00 Mar 14 10:51:06 fan root: Metadata ratio:#011#011 1.00 Mar 14 10:51:06 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Data,single: Size:79.00GiB, Used:78.43GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Metadata,single: Size:12.00GiB, Used:2.46GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 12.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Unallocated: Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 108.97GiB Mar 14 10:51:06 fan root: BEGIN btrfs balance start -mprofiles=dup / Mar 14 10:51:06 fan root: Done, had to relocate 0 out of 92 chunks Mar 14 10:51:06 fan root: btrfs fi df / Mar 14 10:51:06 fan root: Data, single: total=79.00GiB, used=78.43GiB Mar 14 10:51:06 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 10:51:06 fan root: Metadata, single: total=12.00GiB, used=2.46GiB Mar 14 10:51:06 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 10:51:06 fan root: btrfs fi show / Mar 14 10:51:06 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 10:51:06 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 10:51:06 fan root: #011devid 1 size 200.00GiB used 91.03GiB path /dev/mapper/fanbtr Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: btrfs fi usage / Mar 14 10:51:06 fan root: Overall: Mar 14 10:51:06 fan root: Device size:#011#011 200.00GiB Mar 14 10:51:06 fan root: Device allocated:#011#011 91.03GiB Mar 14 10:51:06 fan root: Device unallocated:#011#011 108.97GiB Mar 14 10:51:06 fan root: Device missing:#011#011 0.00B Mar 14 10:51:06 fan root: Used:#011#011#011 80.89GiB Mar 14 10:51:06 fan root: Free (estimated):#011#011 109.54GiB#011(min: 109.54GiB) Mar 14 10:51:06 fan root: Data ratio:#011#011#011 1.00 Mar 14 10:51:06 fan root: Metadata ratio:#011#011 1.00 Mar 14 10:51:06 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Data,single: Size:79.00GiB, Used:78.43GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Metadata,single: Size:12.00GiB, Used:2.46GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 12.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Unallocated: Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 108.97GiB Mar 14 10:51:06 fan root: BEGIN btrfs balance start --force -sprofiles=dup / Mar 14 10:51:06 fan root: Done, had to relocate 0 out of 92 chunks Mar 14 10:51:06 fan root: btrfs fi df / Mar 14 10:51:06 fan root: Data, single: total=79.00GiB, used=78.43GiB Mar 14 10:51:06 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 10:51:06 fan root: Metadata, single: total=12.00GiB, used=2.46GiB Mar 14 10:51:06 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 10:51:06 fan root: btrfs fi show / Mar 14 10:51:06 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 10:51:06 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 10:51:06 fan root: #011devid 1 size 200.00GiB used 91.03GiB path /dev/mapper/fanbtr Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: btrfs fi usage / Mar 14 10:51:06 fan root: Overall: Mar 14 10:51:06 fan root: Device size:#011#011 200.00GiB Mar 14 10:51:06 fan root: Device allocated:#011#011 91.03GiB Mar 14 10:51:06 fan root: Device unallocated:#011#011 108.97GiB Mar 14 10:51:06 fan root: Device missing:#011#011 0.00B Mar 14 10:51:06 fan root: Used:#011#011#011 80.89GiB Mar 14 10:51:06 fan root: Free (estimated):#011#011 109.54GiB#011(min: 109.54GiB) Mar 14 10:51:06 fan root: Data ratio:#011#011#011 1.00 Mar 14 10:51:06 fan root: Metadata ratio:#011#011 1.00 Mar 14 10:51:06 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Data,single: Size:79.00GiB, Used:78.43GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Metadata,single: Size:12.00GiB, Used:2.46GiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 12.00GiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 10:51:06 fan root: Mar 14 10:51:06 fan root: Unallocated: Mar 14 10:51:06 fan root: /dev/mapper/fanbtr#011 108.97GiB Mar 14 10:51:06 fan root: BEGIN btrfs balance start / Mar 14 11:08:36 fan kernel: [ 2800.565044] BTRFS info (device dm-15): 7 enospc errors during balance Mar 14 11:08:36 fan root: ERROR: error during balancing '/': No space left on device Mar 14 11:08:36 fan root: There may be more info in syslog - try dmesg | tail Mar 14 11:08:36 fan mh: btrfs fi df / Mar 14 11:08:36 fan root: Data, single: total=79.00GiB, used=78.43GiB Mar 14 11:08:36 fan root: System, single: total=32.00MiB, used=16.00KiB Mar 14 11:08:36 fan root: Metadata, single: total=19.00GiB, used=2.46GiB Mar 14 11:08:36 fan root: GlobalReserve, single: total=512.00MiB, used=0.00B Mar 14 11:08:36 fan mh: btrfs fi show / Mar 14 11:08:36 fan root: Label: 'fanbtr' uuid: 90f8d728-6bae-4fca-8cda-b368ba2c008e Mar 14 11:08:36 fan root: #011Total devices 1 FS bytes used 80.89GiB Mar 14 11:08:36 fan root: #011devid 1 size 200.00GiB used 98.03GiB path /dev/mapper/fanbtr Mar 14 11:08:36 fan root: Mar 14 11:08:36 fan mh: btrfs fi usage / Mar 14 11:08:36 fan root: Overall: Mar 14 11:08:36 fan root: Device size:#011#011 200.00GiB Mar 14 11:08:36 fan root: Device allocated:#011#011 98.03GiB Mar 14 11:08:36 fan root: Device unallocated:#011#011 101.97GiB Mar 14 11:08:36 fan root: Device missing:#011#011 0.00B Mar 14 11:08:36 fan root: Used:#011#011#011 80.89GiB Mar 14 11:08:36 fan root: Free (estimated):#011#011 102.54GiB#011(min: 102.54GiB) Mar 14 11:08:36 fan root: Data ratio:#011#011#011 1.00 Mar 14 11:08:36 fan root: Metadata ratio:#011#011 1.00 Mar 14 11:08:36 fan root: Global reserve:#011#011 512.00MiB#011(used: 0.00B) Mar 14 11:08:36 fan root: Mar 14 11:08:36 fan root: Data,single: Size:79.00GiB, Used:78.43GiB Mar 14 11:08:36 fan root: /dev/mapper/fanbtr#011 79.00GiB Mar 14 11:08:36 fan root: Mar 14 11:08:36 fan root: Metadata,single: Size:19.00GiB, Used:2.46GiB Mar 14 11:08:36 fan root: /dev/mapper/fanbtr#011 19.00GiB Mar 14 11:08:36 fan root: Mar 14 11:08:36 fan root: System,single: Size:32.00MiB, Used:16.00KiB Mar 14 11:08:36 fan root: /dev/mapper/fanbtr#011 32.00MiB Mar 14 11:08:36 fan root: Mar 14 11:08:36 fan root: Unallocated: Mar 14 11:08:36 fan root: /dev/mapper/fanbtr#011 101.97GiB Mar 14 11:08:36 fan mh: END btrfs-balance script Full log is at http://q.bofh.de/~mh/stuff/20160314-fanbtr-btrfs-syslog The log was taken with enospc_debug active on the file system and all file system, block device and storage relevant log lines were left in. What does the trace tell us here? Greetings Marc -- ----------------------------------------------------------------------------- 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