https://bugzilla.novell.com/show_bug.cgi?id=811339 https://bugzilla.novell.com/show_bug.cgi?id=811339#c0 Summary: jbd2 thread performing constant IO - System Temporarily Freezes Classification: openSUSE Product: openSUSE 12.3 Version: Final Platform: 64bit OS/Version: SUSE Other Status: NEW Severity: Normal Priority: P5 - None Component: Kernel AssignedTo: kernel-maintainers@forge.provo.novell.com ReportedBy: fedev@gmx.net QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 I'm not sure when this started, but is like the HDD is writing every few seconds, even when the laptop has plenty of free RAM and the swap volume is not in use. What I noticed is that the system stops responding, could be anything from a right click menu that takes a few seconds to come up to a simple request such as requesting for ls -al on my home folder. I was trying to figure out which application was performing the writes and then I saw the top top threads were from jbd2 (jbd2/dm-1-8 and jbd2/dm-2-8). I searched on google and found a few posts and one of them suggested to use the following kernel boot option: transparent_hugepage=never In one of the posts (http://lists.opensuse.org/opensuse/2012-03/msg00890.html), Lars Müller (Samba Team and the person who suggested the kernel boot option) requested to create a bug report about it. While I'm still testing, I have not experienced the same issues since yesterday. ====================================== ====================================== System details: Kernel: 3.7.10-1.1-desktop ====================================== SMART: The disk has some bad sectors however it seems to be within the limits. Not sure if this does make any difference. === START OF INFORMATION SECTION === Model Family: Toshiba 2.5" HDD MK..76GSX Device Model: TOSHIBA MK6476GSX Serial Number: 3246CAV7T LU WWN Device Id: 5 000039 3e3581f10 Firmware Version: GS001C User Capacity: 640,135,028,736 bytes [640 GB] Sector Size: 512 bytes logical/physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS (minor revision not indicated) SATA Version is: SATA 2.6, 3.0 Gb/s (current: 3.0 Gb/s) Local Time is: Mon Mar 25 18:26:10 2013 MYT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x02) Offline data collection activity was completed without error. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 120) seconds. Offline data collection capabilities: (0x51) SMART execute Offline immediate. No Auto Offline data collection support. Suspend Offline collection upon new command. No Offline surface scan supported. Self-test supported. No Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 164) minutes. SCT capabilities: (0x003f) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. 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 0x002f 100 100 050 Pre-fail Always - 0 2 Throughput_Performance 0x0027 100 100 050 Pre-fail Always - 0 3 Spin_Up_Time 0x0023 100 100 002 Pre-fail Always - 1921 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 302 5 Reallocated_Sector_Ct 0x0033 097 097 010 Pre-fail Always - 74 7 Seek_Error_Rate 0x002f 100 100 050 Pre-fail Always - 0 8 Seek_Time_Performance 0x0025 100 100 050 Pre-fail Offline - 0 9 Power_On_Minutes 0x0032 099 099 000 Old_age Always - 9h+02m 10 Spin_Retry_Count 0x0033 105 100 030 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 302 183 Runtime_Bad_Block 0x0032 100 100 001 Old_age Always - 0 184 End-to-End_Error 0x0033 100 100 097 Pre-fail Always - 0 185 Unknown_Attribute 0x0032 100 100 001 Old_age Always - 65535 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Command_Timeout 0x0032 100 098 000 Old_age Always - 13 189 High_Fly_Writes 0x003a 100 100 001 Old_age Always - 0 190 Airflow_Temperature_Cel 0x0022 064 054 040 Old_age Always - 36 (Min/Max 31/38) 191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 2171 192 Power-Off_Retract_Count 0x0022 100 100 000 Old_age Always - 3604535 193 Load_Cycle_Count 0x0032 099 099 000 Old_age Always - 13965 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 26 197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Extended offline Completed without error 00% 413 - # 2 Short offline Completed without error 00% 410 - 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. ====================================== HDD Partitioning: LUKS encrypted volumes with the following logical volumes: --- Logical volume --- LV Path /dev/laptop/home LV Name home VG Name laptop LV UUID 7T1273-MK2W-Yobq-E3iC-1wcn-QMx9-qqa3Tk LV Write Access read/write LV Creation host, time , LV Status available # open 1 LV Size 531.88 GiB Current LE 136162 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 3072 Block device 253:1 --- Logical volume --- LV Path /dev/laptop/root LV Name root VG Name laptop LV UUID 7Ju21h-D1z4-Tx1I-QJJL-gpZc-LZ2X-Qn41r1 LV Write Access read/write LV Creation host, time , LV Status available # open 1 LV Size 60.00 GiB Current LE 15360 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 3072 Block device 253:2 --- Logical volume --- LV Path /dev/laptop/swap LV Name swap VG Name laptop LV UUID 6zL2PI-3mSb-Lk55-uM0i-5fh1-vw56-JcEEUc LV Write Access read/write LV Creation host, time , LV Status available # open 2 LV Size 4.00 GiB Current LE 1024 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 ======================================

free -h total used free shared buffers cached Mem: 3.7G 2.1G 1.6G 0B 68M 927M -/+ buffers/cache: 1.1G 2.6G Swap: 4.0G 0B 4.0G

====================================== Reproducible: Always Steps to Reproduce: 1. 2. 3. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.