Ubuntu
linux package

  1. Bug #276476
  2. Comment #49

Comment 49 for bug 276476

Revision history for this message
Dimitris Kounalakis (dcoun) wrote : Re: INFO: task blocked for more than 120 seconds causes system freeze

bug exists. During a mv command through nfs with big video files in the client machine got the following output
Client nfs machine:
Linux htpc 2.6.31-20-generic #58-Ubuntu SMP Fri Mar 12 04:38:19 UTC 2010 x86_64 GNU/Linux
Server nfs machine:
Linux asterias 2.6.31-20-server #58-Ubuntu SMP Fri Mar 12 05:40:05 UTC 2010 x86_64 GNU/Linux

Apr 5 22:15:09 htpc kernel: [44760.940080] INFO: task mv:5523 blocked for more than 120 seconds.
Apr 5 22:15:09 htpc kernel: [44760.940087] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 5 22:15:09 htpc kernel: [44760.940093] mv D 0000000000000000 0 5523 5506 0x00000000
Apr 5 22:15:09 htpc kernel: [44760.940104] ffff880069105ae8 0000000000000086 ffff880069105a78 0000000000015880
Apr 5 22:15:09 htpc kernel: [44760.940113] ffff88007b131a60 0000000000015880 0000000000015880 0000000000015880
Apr 5 22:15:09 htpc kernel: [44760.940121] 0000000000015880 ffff88007b131a60 0000000000015880 0000000000015880
Apr 5 22:15:09 htpc kernel: [44760.940128] Call Trace:
Apr 5 22:15:09 htpc kernel: [44760.940143] [<ffffffff810da740>] ? sync_page+0x0/0x50
Apr 5 22:15:09 htpc kernel: [44760.940153] [<ffffffff8152ab18>] io_schedule+0x28/0x40
Apr 5 22:15:09 htpc kernel: [44760.940159] [<ffffffff810da77d>] sync_page+0x3d/0x50
Apr 5 22:15:09 htpc kernel: [44760.940166] [<ffffffff8152b247>] __wait_on_bit+0x57/0x80
Apr 5 22:15:09 htpc kernel: [44760.940173] [<ffffffff810da8ee>] wait_on_page_bit+0x6e/0x80
Apr 5 22:15:09 htpc kernel: [44760.940182] [<ffffffff81078a70>] ? wake_bit_function+0x0/0x40
Apr 5 22:15:09 htpc kernel: [44760.940191] [<ffffffff810e4cf0>] ? pagevec_lookup_tag+0x20/0x30
Apr 5 22:15:09 htpc kernel: [44760.940198] [<ffffffff810dad95>] wait_on_page_writeback_range+0xf5/0x190
Apr 5 22:15:09 htpc kernel: [44760.940206] [<ffffffff810dae57>] filemap_fdatawait+0x27/0x30
Apr 5 22:15:09 htpc kernel: [44760.940213] [<ffffffff810db304>] filemap_write_and_wait+0x44/0x50
Apr 5 22:15:09 htpc kernel: [44760.940249] [<ffffffffa02b813b>] nfs_setattr+0x14b/0x170 [nfs]
Apr 5 22:15:09 htpc kernel: [44760.940256] [<ffffffff810da722>] ? __lock_page+0x62/0x70
Apr 5 22:15:09 htpc kernel: [44760.940264] [<ffffffff81078a70>] ? wake_bit_function+0x0/0x40
Apr 5 22:15:09 htpc kernel: [44760.940270] [<ffffffff810da559>] ? find_get_page+0x19/0xa0