I'm running 'sudo stress-ng --hdd 8' on a new skylake system and I'm getting several "INFO: task stress-ng-hdd:XXXXX blocked for more than 120 seconds." errors. After Googling http://www.blackmoreops.com/2014/09/22/linux-kernel-panic-issue-fix-hung_task_timeout_secs-blocked-120-seconds-problem/#Explanation tells me that this can be caused by file system caching not being able to flush data out to the ssd's within two minutes. Which sounds reasonable for a hdd stress test. But can you confirm that this is indeed the expected behaviour or is the hardware maybe failing under the load? It's on the following config: Ubuntu 14.04.3 server Linux 3.19.0-25 Stress-NG 0.03.15 A /boot partition Software raid1 with dm-crypt on top for / Dm-crypt for 2 swap partitions Intel Core i7 6700K Gigabyte GA-Z170X-UD3 2 x Samsung SM951 (256GB M.2, PCI-e 3.0 x4 @ 2.150/1.200MB/s) The dmesg output related to this is this: [278825.706447] INFO: task stress-ng-hdd:12807 blocked for more than 120 seconds. [278825.706969] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.707471] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.707979] stress-ng-hdd D ffff8800819338e8 0 12807 12806 0x00000000 [278825.707981] ffff8800819338e8 ffff88045fc03110 0000000000013e80 ffff880081933fd8 [278825.707982] 0000000000013e80 ffff8804616f13a0 ffff88045fc03110 ffff88045e306068 [278825.707983] ffff88045e306048 ffff88045e30604c ffff88045fc03110 00000000ffffffff [278825.707985] Call Trace: [278825.707989] [] schedule_preempt_disabled+0x29/0x70 [278825.707990] [] __mutex_lock_slowpath+0x95/0x100 [278825.707992] [] mutex_lock+0x23/0x37 [278825.707994] [] fat_alloc_clusters+0x62/0x500 [278825.707996] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.707998] [] ? sched_clock_cpu+0x85/0xc0 [278825.708000] [] ? put_prev_entity+0x31/0x3f0 [278825.708002] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.708004] [] ? alloc_buffer_head+0x21/0x60 [278825.708006] [] ? alloc_buffer_head+0x21/0x60 [278825.708007] [] fat_get_block+0x199/0x210 [278825.708008] [] ? create_empty_buffers+0xa6/0xe0 [278825.708009] [] __block_write_begin+0x18a/0x480 [278825.708010] [] ? lru_cache_add+0xe/0x10 [278825.708012] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.708013] [] ? wait_for_stable_page+0x16/0x50 [278825.708014] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.708015] [] block_write_begin+0x46/0x90 [278825.708016] [] cont_write_begin+0x1b2/0x2c0 [278825.708017] [] fat_write_begin+0x47/0x80 [278825.708019] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.708020] [] generic_perform_write+0xb1/0x1a0 [278825.708022] [] ? file_update_time+0x8a/0xd0 [278825.708023] [] __generic_file_write_iter+0x15f/0x350 [278825.708024] [] ? update_curr+0xe4/0x180 [278825.708026] [] generic_file_write_iter+0x3d/0xb0 [278825.708027] [] new_sync_write+0x81/0xb0 [278825.708029] [] vfs_write+0xb7/0x1f0 [278825.708030] [] ? __schedule+0x37b/0x830 [278825.708031] [] SyS_write+0x46/0xb0 [278825.708033] [] system_call_fastpath+0x16/0x1b [278825.708034] INFO: task stress-ng-hdd:12808 blocked for more than 120 seconds. [278825.708543] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.709052] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.709566] stress-ng-hdd D ffff8800819c38e8 0 12808 12806 0x00000000 [278825.709568] ffff8800819c38e8 ffff88045fc009d0 0000000000013e80 ffff8800819c3fd8 [278825.709569] 0000000000013e80 ffff8804616f09d0 ffff88045fc009d0 0000000000010200 [278825.709570] ffff88045e306048 ffff88045e30604c ffff88045fc009d0 00000000ffffffff [278825.709571] Call Trace: [278825.709572] [] schedule_preempt_disabled+0x29/0x70 [278825.709573] [] __mutex_lock_slowpath+0x95/0x100 [278825.709574] [] mutex_lock+0x23/0x37 [278825.709576] [] fat_alloc_clusters+0x62/0x500 [278825.709577] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.709578] [] ? sched_clock_cpu+0x85/0xc0 [278825.709579] [] ? put_prev_entity+0x31/0x3f0 [278825.709581] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.709582] [] ? alloc_buffer_head+0x21/0x60 [278825.709584] [] ? alloc_buffer_head+0x21/0x60 [278825.709585] [] fat_get_block+0x199/0x210 [278825.709586] [] ? create_empty_buffers+0xa6/0xe0 [278825.709587] [] __block_write_begin+0x18a/0x480 [278825.709588] [] ? lru_cache_add+0xe/0x10 [278825.709589] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.709590] [] ? wait_for_stable_page+0x16/0x50 [278825.709591] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.709592] [] block_write_begin+0x46/0x90 [278825.709593] [] cont_write_begin+0x1b2/0x2c0 [278825.709595] [] fat_write_begin+0x47/0x80 [278825.709596] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.709597] [] generic_perform_write+0xb1/0x1a0 [278825.709598] [] ? file_update_time+0x8a/0xd0 [278825.709600] [] __generic_file_write_iter+0x15f/0x350 [278825.709601] [] ? update_curr+0xe4/0x180 [278825.709602] [] generic_file_write_iter+0x3d/0xb0 [278825.709603] [] new_sync_write+0x81/0xb0 [278825.709605] [] vfs_write+0xb7/0x1f0 [278825.709606] [] ? __schedule+0x37b/0x830 [278825.709607] [] SyS_write+0x46/0xb0 [278825.709608] [] system_call_fastpath+0x16/0x1b [278825.709609] INFO: task stress-ng-hdd:12809 blocked for more than 120 seconds. [278825.710147] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.710688] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.711207] stress-ng-hdd D ffff8800819df8e8 0 12809 12806 0x00000000 [278825.711209] ffff8800819df8e8 ffff88045fc04e80 0000000000013e80 ffff8800819dffd8 [278825.711210] 0000000000013e80 ffff8804616f09d0 ffff88045fc04e80 ffff88045e306068 [278825.711211] ffff88045e306048 ffff88045e30604c ffff88045fc04e80 00000000ffffffff [278825.711212] Call Trace: [278825.711213] [] schedule_preempt_disabled+0x29/0x70 [278825.711214] [] __mutex_lock_slowpath+0x95/0x100 [278825.711215] [] mutex_lock+0x23/0x37 [278825.711217] [] fat_alloc_clusters+0x62/0x500 [278825.711218] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.711219] [] ? sched_clock_cpu+0x85/0xc0 [278825.711220] [] ? put_prev_entity+0x31/0x3f0 [278825.711222] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.711223] [] ? alloc_buffer_head+0x21/0x60 [278825.711224] [] ? alloc_buffer_head+0x21/0x60 [278825.711226] [] fat_get_block+0x199/0x210 [278825.711227] [] ? create_empty_buffers+0xa6/0xe0 [278825.711228] [] __block_write_begin+0x18a/0x480 [278825.711229] [] ? lru_cache_add+0xe/0x10 [278825.711230] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.711231] [] ? wait_for_stable_page+0x16/0x50 [278825.711232] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.711233] [] block_write_begin+0x46/0x90 [278825.711234] [] cont_write_begin+0x1b2/0x2c0 [278825.711236] [] fat_write_begin+0x47/0x80 [278825.711237] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.711238] [] generic_perform_write+0xb1/0x1a0 [278825.711239] [] ? file_update_time+0x8a/0xd0 [278825.711240] [] __generic_file_write_iter+0x15f/0x350 [278825.711242] [] ? update_curr+0xe4/0x180 [278825.711243] [] generic_file_write_iter+0x3d/0xb0 [278825.711244] [] new_sync_write+0x81/0xb0 [278825.711245] [] vfs_write+0xb7/0x1f0 [278825.711246] [] ? __schedule+0x37b/0x830 [278825.711248] [] SyS_write+0x46/0xb0 [278825.711249] [] system_call_fastpath+0x16/0x1b [278825.711250] INFO: task stress-ng-hdd:12810 blocked for more than 120 seconds. [278825.711771] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.712291] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.712819] stress-ng-hdd D ffff88008202b8e8 0 12810 12806 0x00000000 [278825.712820] ffff88008202b8e8 ffff88045fc05850 0000000000013e80 ffff88008202bfd8 [278825.712821] 0000000000013e80 ffff88045fc01d70 ffff88045fc05850 000000000000001f [278825.712822] ffff88045e306048 ffff88045e30604c ffff88045fc05850 00000000ffffffff [278825.712823] Call Trace: [278825.712824] [] schedule_preempt_disabled+0x29/0x70 [278825.712825] [] __mutex_lock_slowpath+0x95/0x100 [278825.712826] [] mutex_lock+0x23/0x37 [278825.712827] [] fat_alloc_clusters+0x62/0x500 [278825.712829] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.712830] [] ? sched_clock_cpu+0x85/0xc0 [278825.712831] [] ? put_prev_entity+0x31/0x3f0 [278825.712832] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.712834] [] ? alloc_buffer_head+0x21/0x60 [278825.712835] [] ? alloc_buffer_head+0x21/0x60 [278825.712836] [] fat_get_block+0x199/0x210 [278825.712837] [] ? create_empty_buffers+0xa6/0xe0 [278825.712838] [] __block_write_begin+0x18a/0x480 [278825.712839] [] ? lru_cache_add+0xe/0x10 [278825.712841] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.712842] [] ? wait_for_stable_page+0x16/0x50 [278825.712843] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.712844] [] block_write_begin+0x46/0x90 [278825.712845] [] cont_write_begin+0x1b2/0x2c0 [278825.712846] [] fat_write_begin+0x47/0x80 [278825.712847] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.712849] [] generic_perform_write+0xb1/0x1a0 [278825.712850] [] ? file_update_time+0x8a/0xd0 [278825.712851] [] __generic_file_write_iter+0x15f/0x350 [278825.712852] [] ? update_curr+0xe4/0x180 [278825.712853] [] generic_file_write_iter+0x3d/0xb0 [278825.712855] [] new_sync_write+0x81/0xb0 [278825.712856] [] vfs_write+0xb7/0x1f0 [278825.712857] [] ? __schedule+0x37b/0x830 [278825.712858] [] SyS_write+0x46/0xb0 [278825.712859] [] system_call_fastpath+0x16/0x1b [278825.712860] INFO: task stress-ng-hdd:12811 blocked for more than 120 seconds. [278825.713390] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.713920] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.714489] stress-ng-hdd D ffff880081b978e8 0 12811 12806 0x00000000 [278825.714490] ffff880081b978e8 ffff88045fc01d70 0000000000013e80 ffff880081b97fd8 [278825.714491] 0000000000013e80 ffff88045fc009d0 ffff88045fc01d70 0000000000010200 [278825.714506] ffff88045e306048 ffff88045e30604c ffff88045fc01d70 00000000ffffffff [278825.714507] Call Trace: [278825.714509] [] schedule_preempt_disabled+0x29/0x70 [278825.714514] [] __mutex_lock_slowpath+0x95/0x100 [278825.714518] [] mutex_lock+0x23/0x37 [278825.714523] [] fat_alloc_clusters+0x62/0x500 [278825.714528] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.714532] [] ? sched_clock_cpu+0x85/0xc0 [278825.714537] [] ? put_prev_entity+0x31/0x3f0 [278825.714542] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.714547] [] ? alloc_buffer_head+0x21/0x60 [278825.714551] [] ? alloc_buffer_head+0x21/0x60 [278825.714556] [] fat_get_block+0x199/0x210 [278825.714559] [] ? create_empty_buffers+0xa6/0xe0 [278825.714560] [] __block_write_begin+0x18a/0x480 [278825.714561] [] ? lru_cache_add+0xe/0x10 [278825.714562] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.714563] [] ? wait_for_stable_page+0x16/0x50 [278825.714564] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.714565] [] block_write_begin+0x46/0x90 [278825.714566] [] cont_write_begin+0x1b2/0x2c0 [278825.714568] [] fat_write_begin+0x47/0x80 [278825.714569] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.714570] [] generic_perform_write+0xb1/0x1a0 [278825.714572] [] ? file_update_time+0x8a/0xd0 [278825.714573] [] __generic_file_write_iter+0x15f/0x350 [278825.714574] [] ? update_curr+0xe4/0x180 [278825.714575] [] generic_file_write_iter+0x3d/0xb0 [278825.714577] [] new_sync_write+0x81/0xb0 [278825.714578] [] vfs_write+0xb7/0x1f0 [278825.714579] [] ? __schedule+0x37b/0x830 [278825.714580] [] SyS_write+0x46/0xb0 [278825.714582] [] system_call_fastpath+0x16/0x1b [278825.714583] INFO: task stress-ng-hdd:12812 blocked for more than 120 seconds. [278825.715143] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.715680] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.716224] stress-ng-hdd D ffff88008199b8e8 0 12812 12806 0x00000000 [278825.716225] ffff88008199b8e8 ffff88045fc02740 0000000000013e80 ffff88008199bfd8 [278825.716226] 0000000000013e80 ffff88045fc013a0 ffff88045fc02740 ffff88045e306068 [278825.716227] ffff88045e306048 ffff88045e30604c ffff88045fc02740 00000000ffffffff [278825.716228] Call Trace: [278825.716229] [] schedule_preempt_disabled+0x29/0x70 [278825.716230] [] __mutex_lock_slowpath+0x95/0x100 [278825.716231] [] mutex_lock+0x23/0x37 [278825.716232] [] fat_alloc_clusters+0x62/0x500 [278825.716234] [] ? dequeue_task_fair+0x44e/0x660 [278825.716235] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.716237] [] ? alloc_buffer_head+0x21/0x60 [278825.716238] [] ? alloc_buffer_head+0x21/0x60 [278825.716239] [] fat_get_block+0x199/0x210 [278825.716240] [] ? create_empty_buffers+0xa6/0xe0 [278825.716241] [] __block_write_begin+0x18a/0x480 [278825.716242] [] ? lru_cache_add+0xe/0x10 [278825.716243] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.716244] [] ? wait_for_stable_page+0x16/0x50 [278825.716245] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.716246] [] block_write_begin+0x46/0x90 [278825.716247] [] cont_write_begin+0x1b2/0x2c0 [278825.716249] [] fat_write_begin+0x47/0x80 [278825.716250] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.716251] [] generic_perform_write+0xb1/0x1a0 [278825.716252] [] ? file_update_time+0x8a/0xd0 [278825.716253] [] __generic_file_write_iter+0x15f/0x350 [278825.716255] [] ? update_curr+0xe4/0x180 [278825.716256] [] generic_file_write_iter+0x3d/0xb0 [278825.716257] [] new_sync_write+0x81/0xb0 [278825.716258] [] vfs_write+0xb7/0x1f0 [278825.716259] [] ? __schedule+0x37b/0x830 [278825.716260] [] SyS_write+0x46/0xb0 [278825.716262] [] system_call_fastpath+0x16/0x1b [278825.716263] INFO: task stress-ng-hdd:12814 blocked for more than 120 seconds. [278825.716808] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278825.717356] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278825.717908] stress-ng-hdd D ffff88045b9838e8 0 12814 12806 0x00000000 [278825.717909] ffff88045b9838e8 ffff88045fc013a0 0000000000013e80 ffff88045b983fd8 [278825.717910] 0000000000013e80 ffff8804616975c0 ffff88045fc013a0 0000000000010200 [278825.717911] ffff88045e306048 ffff88045e30604c ffff88045fc013a0 00000000ffffffff [278825.717912] Call Trace: [278825.717913] [] schedule_preempt_disabled+0x29/0x70 [278825.717914] [] __mutex_lock_slowpath+0x95/0x100 [278825.717915] [] mutex_lock+0x23/0x37 [278825.717917] [] fat_alloc_clusters+0x62/0x500 [278825.717918] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278825.717919] [] ? kmem_cache_alloc+0x1ea/0x220 [278825.717921] [] ? alloc_buffer_head+0x21/0x60 [278825.717922] [] ? alloc_buffer_head+0x21/0x60 [278825.717923] [] fat_get_block+0x199/0x210 [278825.717924] [] ? create_empty_buffers+0xa6/0xe0 [278825.717925] [] __block_write_begin+0x18a/0x480 [278825.717926] [] ? lru_cache_add+0xe/0x10 [278825.717927] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.717928] [] ? wait_for_stable_page+0x16/0x50 [278825.717930] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.717930] [] block_write_begin+0x46/0x90 [278825.717931] [] cont_write_begin+0x1b2/0x2c0 [278825.717933] [] fat_write_begin+0x47/0x80 [278825.717934] [] ? fat_generic_compat_ioctl+0x20/0x20 [278825.717935] [] generic_perform_write+0xb1/0x1a0 [278825.717936] [] ? file_update_time+0x8a/0xd0 [278825.717938] [] __generic_file_write_iter+0x15f/0x350 [278825.717939] [] ? update_curr+0xe4/0x180 [278825.717940] [] generic_file_write_iter+0x3d/0xb0 [278825.717941] [] new_sync_write+0x81/0xb0 [278825.717942] [] vfs_write+0xb7/0x1f0 [278825.717943] [] ? __schedule+0x37b/0x830 [278825.717945] [] SyS_write+0x46/0xb0 [278825.717946] [] system_call_fastpath+0x16/0x1b [278945.484736] INFO: task stress-ng-hdd:12807 blocked for more than 120 seconds. [278945.485311] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278945.485867] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278945.486429] stress-ng-hdd D ffff8800819338e8 0 12807 12806 0x00000000 [278945.486431] ffff8800819338e8 ffff88045fc03110 0000000000013e80 ffff880081933fd8 [278945.486433] 0000000000013e80 ffff8804616f13a0 ffff88045fc03110 ffff88045e306068 [278945.486434] ffff88045e306048 ffff88045e30604c ffff88045fc03110 00000000ffffffff [278945.486435] Call Trace: [278945.486439] [] schedule_preempt_disabled+0x29/0x70 [278945.486441] [] __mutex_lock_slowpath+0x95/0x100 [278945.486442] [] mutex_lock+0x23/0x37 [278945.486444] [] fat_alloc_clusters+0x62/0x500 [278945.486447] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278945.486449] [] ? sched_clock_cpu+0x85/0xc0 [278945.486450] [] ? put_prev_entity+0x31/0x3f0 [278945.486452] [] ? kmem_cache_alloc+0x1ea/0x220 [278945.486454] [] ? alloc_buffer_head+0x21/0x60 [278945.486456] [] ? alloc_buffer_head+0x21/0x60 [278945.486457] [] fat_get_block+0x199/0x210 [278945.486458] [] ? create_empty_buffers+0xa6/0xe0 [278945.486459] [] __block_write_begin+0x18a/0x480 [278945.486461] [] ? lru_cache_add+0xe/0x10 [278945.486462] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.486463] [] ? wait_for_stable_page+0x16/0x50 [278945.486464] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.486465] [] block_write_begin+0x46/0x90 [278945.486466] [] cont_write_begin+0x1b2/0x2c0 [278945.486468] [] fat_write_begin+0x47/0x80 [278945.486469] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.486470] [] generic_perform_write+0xb1/0x1a0 [278945.486472] [] ? file_update_time+0x8a/0xd0 [278945.486473] [] __generic_file_write_iter+0x15f/0x350 [278945.486474] [] ? update_curr+0xe4/0x180 [278945.486476] [] generic_file_write_iter+0x3d/0xb0 [278945.486477] [] new_sync_write+0x81/0xb0 [278945.486479] [] vfs_write+0xb7/0x1f0 [278945.486480] [] ? __schedule+0x37b/0x830 [278945.486481] [] SyS_write+0x46/0xb0 [278945.486483] [] system_call_fastpath+0x16/0x1b [278945.486484] INFO: task stress-ng-hdd:12808 blocked for more than 120 seconds. [278945.487047] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278945.487612] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278945.488181] stress-ng-hdd D ffff8800819c38e8 0 12808 12806 0x00000000 [278945.488182] ffff8800819c38e8 ffff88045fc009d0 0000000000013e80 ffff8800819c3fd8 [278945.488183] 0000000000013e80 ffff8804616f09d0 ffff88045fc009d0 0000000000010200 [278945.488184] ffff88045e306048 ffff88045e30604c ffff88045fc009d0 00000000ffffffff [278945.488185] Call Trace: [278945.488186] [] schedule_preempt_disabled+0x29/0x70 [278945.488188] [] __mutex_lock_slowpath+0x95/0x100 [278945.488189] [] mutex_lock+0x23/0x37 [278945.488190] [] fat_alloc_clusters+0x62/0x500 [278945.488192] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278945.488193] [] ? sched_clock_cpu+0x85/0xc0 [278945.488194] [] ? put_prev_entity+0x31/0x3f0 [278945.488195] [] ? kmem_cache_alloc+0x1ea/0x220 [278945.488197] [] ? alloc_buffer_head+0x21/0x60 [278945.488198] [] ? alloc_buffer_head+0x21/0x60 [278945.488199] [] fat_get_block+0x199/0x210 [278945.488200] [] ? create_empty_buffers+0xa6/0xe0 [278945.488201] [] __block_write_begin+0x18a/0x480 [278945.488202] [] ? lru_cache_add+0xe/0x10 [278945.488203] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.488204] [] ? wait_for_stable_page+0x16/0x50 [278945.488206] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.488207] [] block_write_begin+0x46/0x90 [278945.488208] [] cont_write_begin+0x1b2/0x2c0 [278945.488209] [] fat_write_begin+0x47/0x80 [278945.488210] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.488211] [] generic_perform_write+0xb1/0x1a0 [278945.488213] [] ? file_update_time+0x8a/0xd0 [278945.488214] [] __generic_file_write_iter+0x15f/0x350 [278945.488215] [] ? update_curr+0xe4/0x180 [278945.488216] [] generic_file_write_iter+0x3d/0xb0 [278945.488217] [] new_sync_write+0x81/0xb0 [278945.488219] [] vfs_write+0xb7/0x1f0 [278945.488220] [] ? __schedule+0x37b/0x830 [278945.488221] [] SyS_write+0x46/0xb0 [278945.488222] [] system_call_fastpath+0x16/0x1b [278945.488223] INFO: task stress-ng-hdd:12809 blocked for more than 120 seconds. [278945.488818] Not tainted 3.19.0-25-generic #26~14.04.1-Ubuntu [278945.489416] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [278945.489995] stress-ng-hdd D ffff8800819df8e8 0 12809 12806 0x00000000 [278945.489996] ffff8800819df8e8 ffff88045fc04e80 0000000000013e80 ffff8800819dffd8 [278945.489997] 0000000000013e80 ffff8804616f09d0 ffff88045fc04e80 ffff88045e306068 [278945.489998] ffff88045e306048 ffff88045e30604c ffff88045fc04e80 00000000ffffffff [278945.489999] Call Trace: [278945.490000] [] schedule_preempt_disabled+0x29/0x70 [278945.490001] [] __mutex_lock_slowpath+0x95/0x100 [278945.490002] [] mutex_lock+0x23/0x37 [278945.490004] [] fat_alloc_clusters+0x62/0x500 [278945.490005] [] ? __alloc_pages_nodemask+0x47f/0xa60 [278945.490006] [] ? sched_clock_cpu+0x85/0xc0 [278945.490007] [] ? put_prev_entity+0x31/0x3f0 [278945.490009] [] ? kmem_cache_alloc+0x1ea/0x220 [278945.490010] [] ? alloc_buffer_head+0x21/0x60 [278945.490011] [] ? alloc_buffer_head+0x21/0x60 [278945.490013] [] fat_get_block+0x199/0x210 [278945.490014] [] ? create_empty_buffers+0xa6/0xe0 [278945.490015] [] __block_write_begin+0x18a/0x480 [278945.490016] [] ? lru_cache_add+0xe/0x10 [278945.490017] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.490018] [] ? wait_for_stable_page+0x16/0x50 [278945.490019] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.490020] [] block_write_begin+0x46/0x90 [278945.490021] [] cont_write_begin+0x1b2/0x2c0 [278945.490023] [] fat_write_begin+0x47/0x80 [278945.490024] [] ? fat_generic_compat_ioctl+0x20/0x20 [278945.490025] [] generic_perform_write+0xb1/0x1a0 [278945.490026] [] ? file_update_time+0x8a/0xd0 [278945.490028] [] __generic_file_write_iter+0x15f/0x350 [278945.490029] [] ? update_curr+0xe4/0x180 [278945.490030] [] generic_file_write_iter+0x3d/0xb0 [278945.490031] [] new_sync_write+0x81/0xb0 [278945.490032] [] vfs_write+0xb7/0x1f0 [278945.490033] [] ? __schedule+0x37b/0x830 [278945.490035] [] SyS_write+0x46/0xb0 [278945.490036] [] system_call_fastpath+0x16/0x1b

When	Who	Action	New State
2015-10-27	Tim Blokdijk	Give more information	Open
2015-11-12	Launchpad Janitor	Expire	Expired

Ubuntustress-ng package

History of question #272365

Ubuntu
stress-ng package