gistfile1.txt

[ 1144.858819] SPL: Loaded module v0.7.0-rc2_4_gf200b83
[ 1144.859083] icp: module license 'CDDL' taints kernel.
[ 1144.859086] Disabling lock debugging due to kernel taint
[ 1146.561672] ZFS: Loaded module v0.7.0-rc2, ZFS pool version 5000, ZFS filesystem version 5
[ 1320.524829]  sdc: sdc1 sdc9
[ 1320.633921]  sdc: sdc1 sdc9
[ 1320.734422]  sdc: sdc1 sdc9
[ 1320.865495]  sdb: sdb1 sdb9
[ 1320.967222]  sdb: sdb1 sdb9
[ 1321.067579]  sdb: sdb1 sdb9
[ 1321.220216] SPL: using hostid 0x00000000
[ 1698.457391]  sdc: sdc1 sdc9
[ 1698.514123]  sdc: sdc1 sdc9
[ 1698.521993]  sdc: sdc1 sdc9
[ 1698.686204]  sdb: sdb1 sdb9
[ 1698.741685]  sdb: sdb1 sdb9
[ 1698.750188]  sdb: sdb1 sdb9
[ 1698.882774]  sdb: sdb1 sdb9
[ 3601.155019] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 3854.544408]  sdc: sdc1 sdc9
[ 3854.597935]  sdc: sdc1 sdc9
[ 3854.688011]  sdc: sdc1 sdc9
[ 3854.836514]  sdb: sdb1 sdb9
[ 3854.881931]  sdb: sdb1 sdb9
[ 3855.002833]  sdb: sdb1 sdb9
[ 4519.349103] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 4786.694288] VERIFY3(c < (1ULL << 24) >> 9) failed (36028797018963967 < 32768)
[ 4786.696140] VERIFY3(c < (1ULL << 24) >> 9) failed (36028797018963967 < 32768)
[ 4786.696142] PANIC at zio.c:267:zio_buf_alloc()
[ 4786.696143] Showing stack for process 24843
[ 4786.696147] CPU: 1 PID: 24843 Comm: z_wr_iss Tainted: P         C O  3.16.0-4-amd64 #1 Debian 3.16.36-1+deb8u1
[ 4786.696147] Hardware name: Dell Inc. PowerEdge 1950/0UR033, BIOS 2.7.0 10/30/2010
[ 4786.696151]  0000000000000000 ffffffff81512391 ffffffffa08e7bdd ffff88035405fca0
[ 4786.696153]  ffffffffa055d38f 0000000000000000 0000000000000030 ffff88035405fcb0
[ 4786.696155]  ffff88035405fc50 2833594649524556 4c553128203c2063 293432203c3c204c
[ 4786.696155] Call Trace:
[ 4786.696163]  [<ffffffff81512391>] ? dump_stack+0x5d/0x78
[ 4786.696173]  [<ffffffffa055d38f>] ? spl_panic+0xbf/0xf0 [spl]
[ 4786.696177]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4786.696229]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4786.696231] VERIFY3(c < (1ULL << 24) >> 9) failed (36028797018963967 < 32768)
[ 4786.696234] PANIC at zio.c:267:zio_buf_alloc()
[ 4786.696251]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4786.696252] Showing stack for process 24842
[ 4786.696270]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4786.696288]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4786.696305]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4786.696323]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4786.696342]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4786.696346]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4786.696365]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4786.696386]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4786.696390]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4786.696393]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4786.696397]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4786.696400]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4786.696402]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4786.696405]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4786.696407]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4786.696412] CPU: 2 PID: 24842 Comm: z_wr_iss Tainted: P         C O  3.16.0-4-amd64 #1 Debian 3.16.36-1+deb8u1
[ 4786.696413] Hardware name: Dell Inc. PowerEdge 1950/0UR033, BIOS 2.7.0 10/30/2010
[ 4786.696417]  0000000000000000 ffffffff81512391 ffffffffa08e7bdd ffff88034ee6bca0
[ 4786.696419]  ffffffffa055d38f 0000000000000000 0000000000000030 ffff88034ee6bcb0
[ 4786.696421]  ffff88034ee6bc50 2833594649524556 4c553128203c2063 293432203c3c204c
[ 4786.696422] Call Trace:
[ 4786.696429]  [<ffffffff81512391>] ? dump_stack+0x5d/0x78
[ 4786.696441]  [<ffffffffa055d38f>] ? spl_panic+0xbf/0xf0 [spl]
[ 4786.696446]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4786.696522]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4786.696545]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4786.696567]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4786.696586]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4786.696609]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4786.696631]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4786.696655]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4786.696659]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4786.696683]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4786.696705]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4786.696709]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4786.696714]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4786.696717]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4786.696721]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4786.696724]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4786.696726]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4786.696728]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4786.720646] PANIC at zio.c:267:zio_buf_alloc()
[ 4786.725886] Showing stack for process 24841
[ 4786.725889] CPU: 0 PID: 24841 Comm: z_wr_iss Tainted: P         C O  3.16.0-4-amd64 #1 Debian 3.16.36-1+deb8u1
[ 4786.725891] Hardware name: Dell Inc. PowerEdge 1950/0UR033, BIOS 2.7.0 10/30/2010
[ 4786.725899]  0000000000000000 ffffffff81512391 ffffffffa08e7bdd ffff88035ae0fca0
[ 4786.725901]  ffffffffa055d38f 0000000000000000 0000000000000030 ffff88035ae0fcb0
[ 4786.725915]  ffff88035ae0fc50
[ 4786.725927]  2833594649524556 4c553128203c2063 293432203c3c204c
[ 4786.725927] Call Trace:
[ 4786.725934]  [<ffffffff81512391>] ? dump_stack+0x5d/0x78
[ 4786.725941]  [<ffffffffa055d38f>] ? spl_panic+0xbf/0xf0 [spl]
[ 4786.725947]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4786.725969]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4786.725986]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4786.726004]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4786.726022]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4786.726039]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4786.726058]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4786.726077]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4786.726079]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4786.726100]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4786.726120]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4786.726124]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4786.726127]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4786.726130]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4786.726132]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4786.726134]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4786.726136]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4786.726138]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.216033] INFO: task z_wr_iss:24841 blocked for more than 120 seconds.
[ 4920.222502]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 4920.229056] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.235721] z_wr_iss        D ffff88035057ba48     0 24841      2 0x00000000
[ 4920.235728]  ffff88035057b5f0 0000000000000046 0000000000012f40 ffff88035ae0ffd8
[ 4920.235734]  0000000000012f40 ffff88035057b5f0 ffffffffa08e7bdd ffff88035ae0fca0
[ 4920.235737]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff8800ac9a1010
[ 4920.235741] Call Trace:
[ 4920.235754]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 4920.235770]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4920.235822]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4920.235844]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4920.235862]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4920.235884]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4920.235903]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4920.235925]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4920.235953]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4920.235961]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4920.235982]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4920.236006]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4920.236018]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4920.236023]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4920.236031]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4920.236035]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4920.236038]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.236042]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4920.236045]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.236048] INFO: task z_wr_iss:24842 blocked for more than 120 seconds.
[ 4920.242819]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 4920.249658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.256598] z_wr_iss        D ffff88039c54b078     0 24842      2 0x00000000
[ 4920.256603]  ffff88039c54ac20 0000000000000046 0000000000012f40 ffff88034ee6bfd8
[ 4920.256609]  0000000000012f40 ffff88039c54ac20 ffffffffa08e7bdd ffff88034ee6bca0
[ 4920.256612]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff880331dfcc50
[ 4920.256615] Call Trace:
[ 4920.256621]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 4920.256626]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4920.256648]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4920.256670]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4920.256688]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4920.256709]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4920.256728]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4920.256749]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4920.256769]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4920.256775]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4920.256795]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4920.256817]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4920.256824]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4920.256827]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4920.256831]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4920.256834]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4920.256838]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.256841]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4920.256844]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.256847] INFO: task z_wr_iss:24843 blocked for more than 120 seconds.
[ 4920.263897]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 4920.271018] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.278263] z_wr_iss        D ffff88007fc49788     0 24843      2 0x00000000
[ 4920.278268]  ffff88007fc49330 0000000000000046 0000000000012f40 ffff88035405ffd8
[ 4920.278273]  0000000000012f40 ffff88007fc49330 ffffffffa08e7bdd ffff88035405fca0
[ 4920.278276]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff8800acfc9670
[ 4920.278279] Call Trace:
[ 4920.278285]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 4920.278296]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 4920.278318]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 4920.278339]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 4920.278357]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 4920.278379]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 4920.278397]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 4920.278419]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 4920.278439]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 4920.278452]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4920.278473]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 4920.278496]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 4920.278501]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 4920.278506]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 4920.278511]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 4920.278514]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4920.278517]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.278520]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4920.278523]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.278531] INFO: task txg_sync:24939 blocked for more than 120 seconds.
[ 4920.285821]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 4920.293151] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.300518] txg_sync        D ffff880354188f38     0 24939      2 0x00000000
[ 4920.300522]  ffff880354188ae0 0000000000000046 0000000000012f40 ffff88034be8ffd8
[ 4920.300526]  0000000000012f40 ffff880354188ae0 ffff8803afc937f0 ffff880350520488
[ 4920.300529]  ffff8803505204c0 0000000000000001 ffff880350520108 ffff88034be8fd18
[ 4920.300532] Call Trace:
[ 4920.300535]  [<ffffffff81515069>] ? io_schedule+0x99/0x120
[ 4920.300541]  [<ffffffffa055f0aa>] ? cv_wait_common+0x8a/0xf0 [spl]
[ 4920.300545]  [<ffffffff810a9590>] ? prepare_to_wait_event+0xf0/0xf0
[ 4920.300566]  [<ffffffffa084bf6b>] ? zio_wait+0xdb/0x160 [zfs]
[ 4920.300592]  [<ffffffffa07d288a>] ? dsl_pool_sync+0xaa/0x450 [zfs]
[ 4920.300619]  [<ffffffffa07ec980>] ? spa_sync+0x3e0/0xd10 [zfs]
[ 4920.300646]  [<ffffffffa07fdecf>] ? txg_sync_thread+0x2ef/0x490 [zfs]
[ 4920.300673]  [<ffffffffa07fdbe0>] ? txg_fini+0x2b0/0x2b0 [zfs]
[ 4920.300678]  [<ffffffffa055a36b>] ? thread_generic_wrapper+0x6b/0x80 [spl]
[ 4920.300682]  [<ffffffffa055a300>] ? __thread_exit+0x20/0x20 [spl]
[ 4920.300686]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 4920.300689]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.300692]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 4920.300695]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 4920.300699] INFO: task dpkg:9691 blocked for more than 120 seconds.
[ 4920.308071]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 4920.315392] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4920.322721] dpkg            D ffff88035406f178     0  9691   9688 0x00000000
[ 4920.322726]  ffff88035406ed20 0000000000000082 0000000000012f40 ffff8800ae1a3fd8
[ 4920.322731]  0000000000012f40 ffff88035406ed20 ffff8803afcd37f0 ffff88033d82b840
[ 4920.322734]  ffff88033d82b878 0000000000000001 0000000000000000 ffff880330cbb7e8
[ 4920.322737] Call Trace:
[ 4920.322741]  [<ffffffff81515069>] ? io_schedule+0x99/0x120
[ 4920.322746]  [<ffffffffa055f0aa>] ? cv_wait_common+0x8a/0xf0 [spl]
[ 4920.322756]  [<ffffffff810a9590>] ? prepare_to_wait_event+0xf0/0xf0
[ 4920.322779]  [<ffffffffa084bf6b>] ? zio_wait+0xdb/0x160 [zfs]
[ 4920.322802]  [<ffffffffa08458a9>] ? zil_commit.part.11+0x3b9/0x750 [zfs]
[ 4920.322806]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 4920.322826]  [<ffffffffa0853fe0>] ? zpl_writepages+0xd0/0x170 [zfs]
[ 4920.322833]  [<ffffffff811405ee>] ? __filemap_fdatawrite_range+0x4e/0x60
[ 4920.322839]  [<ffffffff811d86b2>] ? SyS_sync_file_range+0x132/0x150
[ 4920.322842]  [<ffffffff8151854d>] ? system_call_fast_compare_end+0x10/0x15
[ 5040.320027] INFO: task z_wr_iss:24841 blocked for more than 120 seconds.
[ 5040.327465]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 5040.334935] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 5040.342436] z_wr_iss        D ffff88035057ba48     0 24841      2 0x00000000
[ 5040.342441]  ffff88035057b5f0 0000000000000046 0000000000012f40 ffff88035ae0ffd8
[ 5040.342445]  0000000000012f40 ffff88035057b5f0 ffffffffa08e7bdd ffff88035ae0fca0
[ 5040.342448]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff8800ac9a1010
[ 5040.342451] Call Trace:
[ 5040.342462]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 5040.342473]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 5040.342509]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 5040.342527]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 5040.342546]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 5040.342565]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 5040.342585]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 5040.342603]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 5040.342624]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 5040.342636]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 5040.342657]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 5040.342678]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 5040.342683]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 5040.342687]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 5040.342692]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 5040.342696]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 5040.342699]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.342702]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 5040.342705]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.342708] INFO: task z_wr_iss:24842 blocked for more than 120 seconds.
[ 5040.350218]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 5040.357795] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 5040.365386] z_wr_iss        D ffff88039c54b078     0 24842      2 0x00000000
[ 5040.365390]  ffff88039c54ac20 0000000000000046 0000000000012f40 ffff88034ee6bfd8
[ 5040.365396]  0000000000012f40 ffff88039c54ac20 ffffffffa08e7bdd ffff88034ee6bca0
[ 5040.365399]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff880331dfcc50
[ 5040.365402] Call Trace:
[ 5040.365408]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 5040.365413]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 5040.365436]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 5040.365456]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 5040.365474]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 5040.365495]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 5040.365514]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 5040.365535]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 5040.365555]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 5040.365560]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 5040.365581]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 5040.365602]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 5040.365609]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 5040.365612]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 5040.365617]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 5040.365619]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 5040.365623]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.365626]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 5040.365629]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.365631] INFO: task z_wr_iss:24843 blocked for more than 120 seconds.
[ 5040.373264]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 5040.380957] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 5040.388633] z_wr_iss        D ffff88007fc49788     0 24843      2 0x00000000
[ 5040.388637]  ffff88007fc49330 0000000000000046 0000000000012f40 ffff88035405ffd8
[ 5040.388643]  0000000000012f40 ffff88007fc49330 ffffffffa08e7bdd ffff88035405fca0
[ 5040.388646]  000000000000010b ffffffffa08c4d93 ffffffffa08e7b40 ffff8800acfc9670
[ 5040.388649] Call Trace:
[ 5040.388655]  [<ffffffffa055d3b5>] ? spl_panic+0xe5/0xf0 [spl]
[ 5040.388664]  [<ffffffffa0559169>] ? spl_kmem_cache_alloc+0x99/0x730 [spl]
[ 5040.388689]  [<ffffffffa0847951>] ? zio_buf_alloc+0x41/0x60 [zfs]
[ 5040.388709]  [<ffffffffa078e3c1>] ? abd_alloc_linear+0x61/0xe0 [zfs]
[ 5040.388727]  [<ffffffffa078e7a6>] ? abd_alloc+0x366/0x4c0 [zfs]
[ 5040.388749]  [<ffffffffa07928b2>] ? arc_get_data_impl.isra.24+0x182/0x3a0 [zfs]
[ 5040.388768]  [<ffffffffa0792bc5>] ? arc_hdr_alloc_abd+0xa5/0xf0 [zfs]
[ 5040.388790]  [<ffffffffa0793a6d>] ? arc_write_ready+0x27d/0x530 [zfs]
[ 5040.388810]  [<ffffffffa084fbd4>] ? zio_compress_data+0x34/0xa0 [zfs]
[ 5040.388816]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 5040.388836]  [<ffffffffa084eac4>] ? zio_ready+0x74/0x380 [zfs]
[ 5040.388868]  [<ffffffffa0848c5f>] ? zio_execute+0x8f/0xf0 [zfs]
[ 5040.388875]  [<ffffffffa055b415>] ? taskq_thread+0x235/0x450 [spl]
[ 5040.388880]  [<ffffffff810982e0>] ? wake_up_state+0x10/0x10
[ 5040.388885]  [<ffffffffa055b1e0>] ? taskq_cancel_id+0x110/0x110 [spl]
[ 5040.388888]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 5040.388891]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.388894]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 5040.388897]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.388902] INFO: task txg_sync:24939 blocked for more than 120 seconds.
[ 5040.396544]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 5040.404227] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 5040.412010] txg_sync        D ffff880354188f38     0 24939      2 0x00000000
[ 5040.412014]  ffff880354188ae0 0000000000000046 0000000000012f40 ffff88034be8ffd8
[ 5040.412019]  0000000000012f40 ffff880354188ae0 ffff8803afc937f0 ffff880350520488
[ 5040.412022]  ffff8803505204c0 0000000000000001 ffff880350520108 ffff88034be8fd18
[ 5040.412026] Call Trace:
[ 5040.412029]  [<ffffffff81515069>] ? io_schedule+0x99/0x120
[ 5040.412034]  [<ffffffffa055f0aa>] ? cv_wait_common+0x8a/0xf0 [spl]
[ 5040.412038]  [<ffffffff810a9590>] ? prepare_to_wait_event+0xf0/0xf0
[ 5040.412059]  [<ffffffffa084bf6b>] ? zio_wait+0xdb/0x160 [zfs]
[ 5040.412088]  [<ffffffffa07d288a>] ? dsl_pool_sync+0xaa/0x450 [zfs]
[ 5040.412115]  [<ffffffffa07ec980>] ? spa_sync+0x3e0/0xd10 [zfs]
[ 5040.412144]  [<ffffffffa07fdecf>] ? txg_sync_thread+0x2ef/0x490 [zfs]
[ 5040.412173]  [<ffffffffa07fdbe0>] ? txg_fini+0x2b0/0x2b0 [zfs]
[ 5040.412179]  [<ffffffffa055a36b>] ? thread_generic_wrapper+0x6b/0x80 [spl]
[ 5040.412185]  [<ffffffffa055a300>] ? __thread_exit+0x20/0x20 [spl]
[ 5040.412188]  [<ffffffff810894bd>] ? kthread+0xbd/0xe0
[ 5040.412191]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.412194]  [<ffffffff81518498>] ? ret_from_fork+0x58/0x90
[ 5040.412197]  [<ffffffff81089400>] ? kthread_create_on_node+0x180/0x180
[ 5040.412202] INFO: task dpkg:9691 blocked for more than 120 seconds.
[ 5040.419983]       Tainted: P         C O  3.16.0-4-amd64 #1
[ 5040.427765] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 5040.435652] dpkg            D ffff88035406f178     0  9691   9688 0x00000000
[ 5040.435657]  ffff88035406ed20 0000000000000082 0000000000012f40 ffff8800ae1a3fd8
[ 5040.435662]  0000000000012f40 ffff88035406ed20 ffff8803afcd37f0 ffff88033d82b840
[ 5040.435665]  ffff88033d82b878 0000000000000001 0000000000000000 ffff880330cbb7e8
[ 5040.435668] Call Trace:
[ 5040.435671]  [<ffffffff81515069>] ? io_schedule+0x99/0x120
[ 5040.435677]  [<ffffffffa055f0aa>] ? cv_wait_common+0x8a/0xf0 [spl]
[ 5040.435687]  [<ffffffff810a9590>] ? prepare_to_wait_event+0xf0/0xf0
[ 5040.435711]  [<ffffffffa084bf6b>] ? zio_wait+0xdb/0x160 [zfs]
[ 5040.435732]  [<ffffffffa08458a9>] ? zil_commit.part.11+0x3b9/0x750 [zfs]
[ 5040.435738]  [<ffffffff81516d0e>] ? mutex_lock+0xe/0x2a
[ 5040.435758]  [<ffffffffa0853fe0>] ? zpl_writepages+0xd0/0x170 [zfs]
[ 5040.435762]  [<ffffffff811405ee>] ? __filemap_fdatawrite_range+0x4e/0x60
[ 5040.435767]  [<ffffffff811d86b2>] ? SyS_sync_file_range+0x132/0x150
[ 5040.435773]  [<ffffffff8151854d>] ? system_call_fast_compare_end+0x10/0x15
root@debian:/mnt/root# 

Did you ever figure out what this was related to? We just uncountered this as well and are trying to hunt down the cause.