Hello, Just tried the newly backported 4.9.18 into Jessie and it has the same issue. Here's the kernel stack trace:
[ 244.410528] INFO: task systemd-udevd:630 blocked for more than 120 seconds. [ 244.410595] Not tainted 4.9.0-0.bpo.2-amd64 #1 [ 244.410634] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 244.410693] systemd-udevd D 0 630 549 0x00000004 [ 244.410698] ffff9bdbf5c04800 0000000000000000 ffff9bdbf850b040 ffff9bdbf5c68100 [ 244.410702] ffff9bdbff218700 ffffa73fce1e3b50 ffffffff859f784d 00000000000014ac [ 244.410706] ffff9bdbf5c68100 000000008542476b ffff9bdb00000001 ffff9bdbf5c68100 [ 244.410710] Call Trace: [ 244.410721] [<ffffffff859f784d>] ? __schedule+0x23d/0x6d0 [ 244.410736] [<ffffffffc06ee6b0>] ? uncore_cpu_prepare+0x100/0x100 [intel_uncore] [ 244.410739] [<ffffffff859f7d12>] ? schedule+0x32/0x80 [ 244.410742] [<ffffffff859fb249>] ? schedule_timeout+0x249/0x300 [ 244.410753] [<ffffffff859f7855>] ? __schedule+0x245/0x6d0 [ 244.410760] [<ffffffffc06ee554>] ? uncore_alloc_box+0x74/0xd0 [intel_uncore] [ 244.410775] [<ffffffff8542ecc5>] ? sched_clock+0x5/0x10 [ 244.410782] [<ffffffffc06ee6b0>] ? uncore_cpu_prepare+0x100/0x100 [intel_uncore] [ 244.410785] [<ffffffff859f872a>] ? wait_for_completion+0xfa/0x130 [ 244.410792] [<ffffffff854a2b70>] ? wake_up_q+0x60/0x60 [ 244.410796] [<ffffffff85479266>] ? cpuhp_issue_call+0x96/0xc0 [ 244.410798] [<ffffffff8547951a>] ? __cpuhp_setup_state+0xca/0x200 [ 244.410808] [<ffffffffc070d33e>] ? intel_uncore_init+0x1e8/0xeaa [intel_uncore] [ 244.410817] [<ffffffffc070d156>] ? uncore_type_init+0x156/0x156 [intel_uncore] [ 244.410822] [<ffffffff8540218c>] ? do_one_initcall+0x4c/0x180 [ 244.410829] [<ffffffff8557c48f>] ? do_init_module+0x5a/0x1f1 [ 244.410835] [<ffffffff85501e3e>] ? load_module+0x23ce/0x28e0 [ 244.410838] [<ffffffff854fe6a0>] ? __symbol_put+0x60/0x60 [ 244.410844] [<ffffffff85603434>] ? vfs_read+0x114/0x130 [ 244.410853] [<ffffffff856a3f11>] ? security_capable+0x41/0x60 [ 244.410855] [<ffffffff8550253e>] ? SYSC_finit_module+0x8e/0xe0 [ 244.410859] [<ffffffff859fc5bb>] ? system_call_fast_compare_end+0xc/0x9b Thank you, -- Rumen Telbizov Unix Systems Administrator <http://telbizov.com>
