On 11/24/2015 09:15 PM, Laurent Bonnaud wrote:
On 23/11/2015 02:00, Qu Wenruo wrote:
Considering the size, I'd like not to touch the dump, metadata is over 5G,
It is only 2GB once compressed :>.
The size seems small enough, I'll try to download it as it's super
useful to debug it.
and I think it's not related to on-disk data, but runtime problem like I
mentioned above.
To test this hypothesis I did the following:
- reboot the machine with a 4.3.0 kernel from Debian experimental
- run "du" on the btrfs FS as a quick sanity check
Nice reproducer.
Is it 100% reproducible or has a chance to reproduce?
Thanks,
Qu
The kernel went read-only again with the following kernel errors:
[ 5759.890934] BTRFS info (device sdb1): disk space caching is enabled
[ 5773.278244] BTRFS warning (device sdb1): block group 314635714560 has wrong
amount of free space
[ 5773.278247] BTRFS warning (device sdb1): failed to load free space cache for
block group 314635714560, rebuild it now
[ 5773.947885] ------------[ cut here ]------------
[ 5773.947908] WARNING: CPU: 0 PID: 2546 at
/build/linux-7sjCdl/linux-4.3/fs/btrfs/extent-tree.c:2851
btrfs_run_delayed_refs+0x26b/0x2a0 [btrfs]()
[ 5773.947909] BTRFS: Transaction aborted (error -17)
[ 5773.947910] Modules linked in: xt_multiport cpufreq_conservative
cpufreq_powersave cpufreq_userspace cpufreq_stats ip6table_filter ip6_tables
iptable_filter ip_tables x_tables binfmt_misc snd_hda_codec_analog
snd_hda_codec_generic dell_wmi iTCO_wdt iTCO_vendor_support sparse_keymap evdev
coretemp kvm_intel dcdbas snd_hda_intel snd_hda_codec snd_hda_core kvm
snd_hwdep i915 snd_pcm_oss snd_mixer_oss pcspkr sg snd_pcm psmouse lpc_ich
mfd_core serio_raw i2c_i801 snd_timer snd shpchp tpm_tis video drm_kms_helper
drm soundcore mei_me mei i2c_algo_bit wmi tpm 8250_fintek button acpi_cpufreq
processor ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp
libiscsi_tcp libiscsi scsi_transport_iscsi drbd lru_cache libcrc32c parport_pc
ppdev lp parport loop dm_crypt dm_mod autofs4 ext4 crc16 mbcache
[ 5773.947951] jbd2 crc32c_generic btrfs xor raid6_pq md_mod ses enclosure
hid_generic usbhid hid sd_mod uas usb_storage ahci libahci ata_generic libata
scsi_mod e1000e ptp pps_core ehci_pci uhci_hcd ehci_hcd usbcore usb_common
[ 5773.947967] CPU: 0 PID: 2546 Comm: kworker/u16:2 Not tainted
4.3.0-trunk-amd64 #1 Debian 4.3-1~exp1
[ 5773.947968] Hardware name: Dell Inc. OptiPlex 780 /0C27VV,
BIOS A08 01/21/2011
[ 5773.947981] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 5773.947983] ffffffffa02a8250 ffffffff812c53a9 ffff8800af283d30
ffffffff8106ebad
[ 5773.947985] ffff8800ace5eae0 ffff8800af283d80 ffff8800ac6ade70
ffff8800ac6add10
[ 5773.947987] 0000000000000020 ffffffff8106ec2c ffffffffa02a8420
0000000000000020
[ 5773.947989] Call Trace:
[ 5773.947994] [<ffffffff812c53a9>] ? dump_stack+0x40/0x57
[ 5773.947997] [<ffffffff8106ebad>] ? warn_slowpath_common+0x7d/0xb0
[ 5773.947999] [<ffffffff8106ec2c>] ? warn_slowpath_fmt+0x4c/0x50
[ 5773.948019] [<ffffffffa021908b>] ? btrfs_run_delayed_refs+0x26b/0x2a0
[btrfs]
[ 5773.948027] [<ffffffffa02190f2>] ? delayed_ref_async_start+0x32/0x80 [btrfs]
[ 5773.948039] [<ffffffffa025bd98>] ? btrfs_scrubparity_helper+0xc8/0x260
[btrfs]
[ 5773.948041] [<ffffffff810851df>] ? process_one_work+0x19f/0x3d0
[ 5773.948043] [<ffffffff8108545d>] ? worker_thread+0x4d/0x450
[ 5773.948044] [<ffffffff81085410>] ? process_one_work+0x3d0/0x3d0
[ 5773.948046] [<ffffffff8108af5d>] ? kthread+0xbd/0xe0
[ 5773.948048] [<ffffffff8108aea0>] ? kthread_create_on_node+0x170/0x170
[ 5773.948051] [<ffffffff81553c5f>] ? ret_from_fork+0x3f/0x70
[ 5773.948053] [<ffffffff8108aea0>] ? kthread_create_on_node+0x170/0x170
[ 5773.948054] ---[ end trace 654b175f2543b4e4 ]---
[ 5773.948057] BTRFS: error (device sdb1) in btrfs_run_delayed_refs:2851:
errno=-17 Object already exists
[ 5773.948092] BTRFS info (device sdb1): forced readonly
[ 5936.235238] perf interrupt took too long (2502 > 2500), lowering
kernel.perf_event_max_sample_rate to 50000
[ 6427.280125] BTRFS (device sdb1): parent transid verify failed on
353291255808 wanted 9058 found 9056
[ 6427.288873] BTRFS (device sdb1): parent transid verify failed on
353291255808 wanted 9058 found 9056
[ 6427.381126] BTRFS (device sdb1): parent transid verify failed on
353291255808 wanted 9058 found 9056
[ 6427.381747] BTRFS (device sdb1): parent transid verify failed on
353291255808 wanted 9058 found 9056
[...]
Are you interested in the btrfs-image output now ?
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