Dec 12 15:21:00 localhost kernel: [ 2157.064991] INFO: task qemu-kvm:13549 blocked for more than 120 seconds.

Dec 12 15:21:00 localhost kernel: [ 2157.064996] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

Dec 12 15:21:00 localhost kernel: [ 2157.065000] qemu-kvm        D 0000000000000002     0 13549      1 0x00000000

Dec 12 15:21:00 localhost kernel: [ 2157.065009]  ffff8800ad87f978 0000000000000082 ffff8800ad87f8b8 ffffffff810fd165

Dec 12 15:21:00 localhost kernel: [ 2157.065017]  ffff8801236d6bd0 ffff8800ad87ffd8 ffff8800ad87ffd8 ffff8800ad87ffd8

Dec 12 15:21:00 localhost kernel: [ 2157.065025]  ffff880136fc0e60 ffff8801236d6bd0 ffff8800ad87fac0 ffff880130852468

Dec 12 15:21:00 localhost kernel: [ 2157.065033] Call Trace:

Dec 12 15:21:00 localhost kernel: [ 2157.065039]  [<ffffffff810fd165>] ? find_get_pages_tag+0x125/0x150

Dec 12 15:21:00 localhost kernel: [ 2157.065047]  [<ffffffff81109435>] ? pagevec_lookup_tag+0x25/0x40

Dec 12 15:21:00 localhost kernel: [ 2157.065067]  [<ffffffffa01426de>] ? write_cache_pages_da+0x15e/0x460 [ext4]

Dec 12 15:21:00 localhost kernel: [ 2157.065075]  [<ffffffff8101c139>] ? read_tsc+0x9/0x20

Dec 12 15:21:00 localhost kernel: [ 2157.065082]  [<ffffffff810fd470>] ? __lock_page+0x70/0x70

Dec 12 15:21:00 localhost kernel: [ 2157.065089]  [<ffffffff81406dbf>] schedule+0x3f/0x60

Dec 12 15:21:00 localhost kernel: [ 2157.065097]  [<ffffffff81406e6f>] io_schedule+0x8f/0xd0

Dec 12 15:21:00 localhost kernel: [ 2157.065103]  [<ffffffff810fd47e>] sleep_on_page+0xe/0x20

Dec 12 15:21:00 localhost kernel: [ 2157.065111]  [<ffffffff8140761f>] __wait_on_bit+0x5f/0x90

Dec 12 15:21:00 localhost kernel: [ 2157.065118]  [<ffffffff810fd668>] wait_on_page_bit+0x78/0x80

Dec 12 15:21:00 localhost kernel: [ 2157.065126]  [<ffffffff81084fb0>] ? autoremove_wake_function+0x40/0x40

Dec 12 15:21:00 localhost kernel: [ 2157.065134]  [<ffffffff810fd7dc>] filemap_fdatawait_range+0x10c/0x1a0

Dec 12 15:21:00 localhost kernel: [ 2157.065144]  [<ffffffff810fe7c8>] filemap_write_and_wait_range+0x68/0x80

Dec 12 15:21:00 localhost kernel: [ 2157.065163]  [<ffffffffa013922f>] ext4_sync_file+0x6f/0x450 [ext4]

Dec 12 15:21:00 localhost kernel: [ 2157.065174]  [<ffffffff8118a725>] generic_write_sync+0x55/0x70

Dec 12 15:21:00 localhost kernel: [ 2157.065182]  [<ffffffff810fee56>] generic_file_aio_write+0xc6/0xe0

Dec 12 15:21:00 localhost kernel: [ 2157.065200]  [<ffffffffa0138f5f>] ext4_file_write+0xbf/0x250 [ext4]

Dec 12 15:21:00 localhost kernel: [ 2157.065210]  [<ffffffff8115dd35>] ? rw_copy_check_uvector+0xf5/0x130

Dec 12 15:21:00 localhost kernel: [ 2157.065228]  [<ffffffffa0138ea0>] ? ext4_llseek+0x170/0x170 [ext4]

Dec 12 15:21:00 localhost kernel: [ 2157.065237]  [<ffffffff8115db73>] do_sync_readv_writev+0xd3/0x110

Dec 12 15:21:00 localhost kernel: [ 2157.065246]  [<ffffffff8115dd35>] ? rw_copy_check_uvector+0xf5/0x130

Dec 12 15:21:00 localhost kernel: [ 2157.065255]  [<ffffffff811e6eac>] ? security_file_permission+0x2c/0xb0

Dec 12 15:21:00 localhost kernel: [ 2157.065264]  [<ffffffff8115d271>] ? rw_verify_area+0x61/0xf0

Dec 12 15:21:00 localhost kernel: [ 2157.065272]  [<ffffffff8115de3d>] do_readv_writev+0xcd/0x1d0

Dec 12 15:21:00 localhost kernel: [ 2157.065281]  [<ffffffff81076d45>] ? kill_pid_info+0x55/0x80

Dec 12 15:21:00 localhost kernel: [ 2157.065289]  [<ffffffff810781de>] ? sys_kill+0x9e/0x1c0

Dec 12 15:21:00 localhost kernel: [ 2157.065298]  [<ffffffff8115df7c>] vfs_writev+0x3c/0x50

Dec 12 15:21:00 localhost kernel: [ 2157.065306]  [<ffffffff8115e2c2>] sys_pwritev+0xa2/0xc0

Dec 12 15:21:00 localhost kernel: [ 2157.065313]  [<ffffffff8140a502>] system_call_fastpath+0x16/0x1b