[ 38.413109] ------------[ cut here ]------------ [ 38.413119] WARNING: CPU: 1 PID: 6 at kernel/sched/core.c:7291 __might_sleep+0x87/0x90() [ 38.413124] do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff81898dd5>] wait_for_completion_io+0xe5/0x140 ... [ 38.413200] CPU: 1 PID: 6 Comm: kworker/u16:0 Tainted: G C 4.1.0-0.rc3.git0.1.fc23.x86_64+debug #1 ... [ 38.413217] Call Trace: [ 38.413221] [<ffffffff81895355>] dump_stack+0x4c/0x65 [ 38.413224] [<ffffffff810b043a>] warn_slowpath_common+0x8a/0xc0 [ 38.413227] [<ffffffff810b04c5>] warn_slowpath_fmt+0x55/0x70 [ 38.413229] [<ffffffff81898dd5>] ? wait_for_completion_io+0xe5/0x140 [ 38.413230] [<ffffffff81898dd5>] ? wait_for_completion_io+0xe5/0x140 [ 38.413232] [<ffffffff810e0b67>] __might_sleep+0x87/0x90 [ 38.413235] [<ffffffff813fdeaf>] generic_make_request_checks+0x3f/0x600 [ 38.413238] [<ffffffff8189e726>] ? _raw_spin_unlock_irqrestore+0x36/0x70 [ 38.413241] [<ffffffff811102fd>] ? trace_hardirqs_on_caller+0x13d/0x1e0 [ 38.413243] [<ffffffff813fe497>] generic_make_request+0x27/0x130 [ 38.413250] [<ffffffffa0000438>] raid1_unplug+0x108/0x160 [raid1] [ 38.413253] [<ffffffff8140437a>] blk_flush_plug_list+0x9a/0x260 [ 38.413256] [<ffffffff81897710>] io_schedule_timeout+0x120/0x130 [ 38.413258] [<ffffffff81898df7>] wait_for_completion_io+0x107/0x140 [ 38.413260] [<ffffffff810e9c90>] ? wake_up_state+0x20/0x20 [ 38.413263] [<ffffffff8140c087>] __blkdev_issue_zeroout+0x227/0x270 [ 38.413265] [<ffffffff81898d3a>] ? wait_for_completion_io+0x4a/0x140 [ 38.413268] [<ffffffff8140c17a>] blkdev_issue_zeroout+0xaa/0x100 [ 38.413271] [<ffffffff813512f2>] ext4_ext_zeroout.isra.34+0x52/0x60 [ 38.413274] [<ffffffff813572a0>] ext4_ext_handle_unwritten_extents+0x680/0x10d0 [ 38.413276] [<ffffffff81358247>] ext4_ext_map_blocks+0x527/0x13c0 [ 38.413279] [<ffffffff81324779>] ? ext4_map_blocks+0x179/0x510 [ 38.413281] [<ffffffff81324779>] ? ext4_map_blocks+0x179/0x510 [ 38.413283] [<ffffffff8132479d>] ext4_map_blocks+0x19d/0x510 [ 38.413285] [<ffffffff8132828d>] ext4_writepages+0x7fd/0x13e0 [ 38.413289] [<ffffffff81201c91>] do_writepages+0x21/0x40 [ 38.413292] [<ffffffff812b72c0>] __writeback_single_inode+0x70/0xb00 [ 38.413294] [<ffffffff812b8360>] writeback_sb_inodes+0x2c0/0x680 [ 38.413296] [<ffffffff812b87c2>] __writeback_inodes_wb+0xa2/0xd0 [ 38.413298] [<ffffffff812b8c03>] wb_writeback+0x413/0x790 [ 38.413300] [<ffffffff812a2224>] ? get_nr_inodes+0x54/0x80 [ 38.413302] [<ffffffff812b95b1>] bdi_writeback_workfn+0x3b1/0x8c0 [ 38.413305] [<ffffffff810d1572>] process_one_work+0x232/0x860 [ 38.413307] [<ffffffff810d14db>] ? process_one_work+0x19b/0x860 [ 38.413309] [<ffffffff810d1c7a>] ? worker_thread+0xda/0x470 [ 38.413312] [<ffffffff810d1bf3>] worker_thread+0x53/0x470 [ 38.413314] [<ffffffff810d1ba0>] ? process_one_work+0x860/0x860 [ 38.413316] [<ffffffff810d86c4>] kthread+0x104/0x120 [ 38.413319] [<ffffffff810ee045>] ? local_clock+0x25/0x30 [ 38.413321] [<ffffffff810d85c0>] ? kthread_create_on_node+0x250/0x250 [ 38.413323] [<ffffffff8189f5a2>] ret_from_fork+0x42/0x70 [ 38.413325] [<ffffffff810d85c0>] ? kthread_create_on_node+0x250/0x250 [ 38.413327] ---[ end trace ca9ea5620ac2e2e0 ]---
https://bugzilla.redhat.com/show_bug.cgi?id=1220519
This shall remain for you, and the other one goes to MD/RAID folks https://bugzilla.kernel.org/show_bug.cgi?id=98191
*** This bug has been marked as a duplicate of bug 98191 ***