On 2019/5/1 下午9:54, Hendrik Friedel wrote: > Hello, > > as discussed in the other thread, I am migrating to BTRFS (again). > Unfortunately, I had a bit of a rough start > [Mo Apr 29 20:44:47 2019] INFO: task btrfs-transacti:10227 blocked for > more than 120 seconds. > [...] > This repeated several times while moving data over. Full log of one > instance below. > > I am using btrfs-progs v4.20.2 and debian stretch with > 4.19.0-0.bpo.2-amd64 (I think, this is the latest Kernel available in > stretch. Please correct if I am wrong. > > I understand that this was a 'timeout'. Is this caused by hardware? Transaction get blocked for 2 minutes, depends on the load, it can be either normal or a dead lock. Have you tried stop the workload, and see if the timeout disappears? If it just disappear after some time, then it's the disk too slow and too heavy load, combined with btrfs' low concurrency design leading to the problem. Thanks, Qu > > In the SMART logs indeed, I see that errors happened (Full log below) > 84 51 20 df 27 81 40 Error: ICRC, ABRT 32 sectors at LBA = 0x008127df = > 8464351 > But this happened after 44h. I am now at 82h, so that was long before > the error -infact during my 'burn-in test'. > > Is this a case for an RMA of the drive? > > Greetings, > Hendrik > > > > > > > > > > > > > [Mo Apr 29 20:44:47 2019] INFO: task btrfs-transacti:10227 blocked for > more than 120 seconds. > [Mo Apr 29 20:44:47 2019] Not tainted 4.19.0-0.bpo.2-amd64 #1 > Debian 4.19.16-1~bpo9+1 > [Mo Apr 29 20:44:47 2019] "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [Mo Apr 29 20:44:47 2019] btrfs-transacti D 0 10227 2 0x80000000 > [Mo Apr 29 20:44:47 2019] Call Trace: > [Mo Apr 29 20:44:47 2019] ? __schedule+0x3f5/0x880 > [Mo Apr 29 20:44:47 2019] schedule+0x32/0x80 > [Mo Apr 29 20:44:47 2019] wait_for_commit+0x41/0x80 [btrfs] > [Mo Apr 29 20:44:47 2019] ? remove_wait_queue+0x60/0x60 > [Mo Apr 29 20:44:47 2019] btrfs_commit_transaction+0x10b/0x8a0 [btrfs] > [Mo Apr 29 20:44:47 2019] ? start_transaction+0x8f/0x3e0 [btrfs] > [Mo Apr 29 20:44:47 2019] transaction_kthread+0x157/0x180 [btrfs] > [Mo Apr 29 20:44:47 2019] kthread+0xf8/0x130 > [Mo Apr 29 20:44:47 2019] ? btrfs_cleanup_transaction+0x500/0x500 [btrfs] > [Mo Apr 29 20:44:47 2019] ? kthread_create_worker_on_cpu+0x70/0x70 > [Mo Apr 29 20:44:47 2019] ret_from_fork+0x35/0x40 > [Mo Apr 29 20:44:47 2019] INFO: task kworker/u4:8:10576 blocked for more > than 120 seconds. > [Mo Apr 29 20:44:47 2019] Not tainted 4.19.0-0.bpo.2-amd64 #1 > Debian 4.19.16-1~bpo9+1 > [Mo Apr 29 20:44:47 2019] "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [Mo Apr 29 20:44:47 2019] kworker/u4:8 D 0 10576 2 0x80000000 > [Mo Apr 29 20:44:47 2019] Workqueue: events_unbound > btrfs_async_reclaim_metadata_space [btrfs] > [Mo Apr 29 20:44:47 2019] Call Trace: > [Mo Apr 29 20:44:47 2019] ? __schedule+0x3f5/0x880 > [Mo Apr 29 20:44:47 2019] schedule+0x32/0x80 > [Mo Apr 29 20:44:47 2019] wait_current_trans+0xb9/0xf0 [btrfs] > [Mo Apr 29 20:44:47 2019] ? remove_wait_queue+0x60/0x60 > [Mo Apr 29 20:44:47 2019] start_transaction+0x201/0x3e0 [btrfs] > [Mo Apr 29 20:44:47 2019] flush_space+0x14d/0x5e0 [btrfs] > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x40/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x34/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x40/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x34/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x34/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x34/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x40/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x34/0x70 > [Mo Apr 29 20:44:47 2019] ? __switch_to_asm+0x40/0x70 > [Mo Apr 29 20:44:47 2019] ? get_alloc_profile+0x72/0x180 [btrfs] > [Mo Apr 29 20:44:47 2019] ? can_overcommit.part.63+0x55/0xe0 [btrfs] > [Mo Apr 29 20:44:47 2019] btrfs_async_reclaim_metadata_space+0xfb/0x4c0 > [btrfs] > [Mo Apr 29 20:44:47 2019] process_one_work+0x191/0x370 > [Mo Apr 29 20:44:47 2019] worker_thread+0x4f/0x3b0 > [Mo Apr 29 20:44:47 2019] kthread+0xf8/0x130 > [Mo Apr 29 20:44:47 2019] ? rescuer_thread+0x340/0x340 > [Mo Apr 29 20:44:47 2019] ? kthread_create_worker_on_cpu+0x70/0x70 > [Mo Apr 29 20:44:47 2019] ret_from_fork+0x35/0x40 > > > > > > SMART Attributes Data Structure revision number: 16 > Vendor Specific SMART Attributes with Thresholds: > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE > UPDATED WHEN_FAILED RAW_VALUE > 1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always > - 0 > 2 Throughput_Performance 0x0004 128 128 054 Old_age > Offline - 116 > 3 Spin_Up_Time 0x0007 198 198 024 Pre-fail Always > - 349 (Average 317) > 4 Start_Stop_Count 0x0012 100 100 000 Old_age Always > - 26 > 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always > - 0 > 7 Seek_Error_Rate 0x000a 100 100 067 Old_age Always > - 0 > 8 Seek_Time_Performance 0x0004 128 128 020 Old_age > Offline - 18 > 9 Power_On_Hours 0x0012 100 100 000 Old_age Always > - 82 > 10 Spin_Retry_Count 0x0012 100 100 060 Old_age Always > - 0 > 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always > - 26 > 22 Helium_Level 0x0023 100 100 025 Pre-fail Always > - 100 > 192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always > - 27 > 193 Load_Cycle_Count 0x0012 100 100 000 Old_age Always > - 27 > 194 Temperature_Celsius 0x0002 250 250 000 Old_age Always > - 26 (Min/Max 24/55) > 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always > - 0 > 197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always > - 0 > 198 Offline_Uncorrectable 0x0008 100 100 000 Old_age > Offline - 0 > 199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always > - 2 > > SMART Error Log Version: 1 > ATA Error Count: 2 > CR = Command Register [HEX] > FR = Features Register [HEX] > SC = Sector Count Register [HEX] > SN = Sector Number Register [HEX] > CL = Cylinder Low Register [HEX] > CH = Cylinder High Register [HEX] > DH = Device/Head Register [HEX] > DC = Device Command Register [HEX] > ER = Error register [HEX] > ST = Status register [HEX] > Powered_Up_Time is measured from power on, and printed as > DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes, > SS=sec, and sss=millisec. It "wraps" after 49.710 days. > > Error 2 occurred at disk power-on lifetime: 44 hours (1 days + 20 hours) > When the command that caused the error occurred, the device was doing > SMART Offline or Self-test. > > After command completion occurred, registers were: > ER ST SC SN CL CH DH > -- -- -- -- -- -- -- > 84 51 20 df 27 81 40 Error: ICRC, ABRT 32 sectors at LBA = 0x008127df > = 8464351 > > Commands leading to the command that caused the error were: > CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name > -- -- -- -- -- -- -- -- ---------------- -------------------- > 35 03 20 df 27 81 40 00 00:00:54.041 WRITE DMA EXT > 35 03 01 ff 27 81 40 00 00:00:54.040 WRITE DMA EXT > 25 03 20 02 00 00 40 00 00:00:54.040 READ DMA EXT > 25 03 20 02 00 00 40 00 00:00:54.040 READ DMA EXT > 25 03 01 af 2a 81 40 00 00:00:54.011 READ DMA EXT > > Error 1 occurred at disk power-on lifetime: 44 hours (1 days + 20 hours) > When the command that caused the error occurred, the device was doing > SMART Offline or Self-test. > > After command completion occurred, registers were: > ER ST SC SN CL CH DH > -- -- -- -- -- -- -- > 84 51 00 00 00 00 00 > > Commands leading to the command that caused the error were: > CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name > -- -- -- -- -- -- -- -- ---------------- -------------------- > 47 00 01 00 00 00 a0 08 00:00:37.434 READ LOG DMA EXT > 47 00 01 13 00 00 a0 08 00:00:37.433 READ LOG DMA EXT > 47 00 01 00 00 00 a0 08 00:00:37.432 READ LOG DMA EXT > ef 10 02 00 00 00 a0 08 00:00:37.430 SET FEATURES [Enable SATA > feature] > 27 00 00 00 00 00 e0 08 00:00:37.427 READ NATIVE MAX ADDRESS EXT > [OBS-ACS-3] > > SMART Self-test log structure revision number 1 > No self-tests have been logged. [To run self-tests, use: smartctl -t] > > SMART Selective self-test log data structure revision number 1 > SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS > 1 0 0 Not_testing > 2 0 0 Not_testing > 3 0 0 Not_testing > 4 0 0 Not_testing > 5 0 0 Not_testing > Selective self-test flags (0x0): > After scanning selected spans, do NOT read-scan remainder of disk. > If Selective self-test is pending on power-up, resume after 0 minute delay. >
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