<pre> [438109.214115] BUG: soft lockup - CPU#3 stuck for 61s! [umount.nfs:15330] [438109.214116] Modules linked in: autofs4 smsc37b787_wdt k8temp i2c_nforce2 i2c_core forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan [438109.214116] CPU 3: [438109.214116] Modules linked in: autofs4 smsc37b787_wdt k8temp i2c_nforce2 i2c_core forcedeth tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan [438109.214116] Pid: 15330, comm: umount.nfs Not tainted 2.6.27-rc8-00016-gd3a47e8 #1 [438109.214116] RIP: 0010:[<ffffffff8027914d>] [<ffffffff8027914d>] find_get_pages+0x6e/0xfe [438109.214116] RSP: 0018:ffff8801c34efcf8 EFLAGS: 00000246 [438109.214116] RAX: ffff8801fd1dd210 RBX: 0000000000000000 RCX: 0000000000000000 [438109.214116] RDX: 0000000000001000 RSI: ffffe2000c03c548 RDI: ffffe2000c03c540 [438109.214116] RBP: ffff8802062b5ea0 R08: 00000000000011f1 R09: 0000000000001000 [438109.214116] R10: 0000000000001000 R11: 0000000000000000 R12: 000000000000000d [438109.214116] R13: 0000000000000040 R14: 0000000000000006 R15: 0000000000000f00 [438109.214116] FS: 00007f94831176f0(0000) GS:ffff88022fa0d780(0000) knlGS:0000000000000000 [438109.214116] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [438109.214116] CR2: 00007fffaa73fec0 CR3: 000000016b8e7000 CR4: 00000000000006e0 [438109.214116] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [438109.214116] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [438109.214116] [438109.214116] Call Trace: [438109.214116] [<ffffffff80279141>] ? find_get_pages+0x62/0xfe [438109.214116] [<ffffffff802790df>] ? find_get_pages+0x0/0xfe [438109.214116] [<ffffffff8027fcf2>] ? pagevec_lookup+0x17/0x1e [438109.214116] [<ffffffff802803e9>] ? truncate_inode_pages_range+0x20a/0x2fc [438109.214116] [<ffffffff802b7ff6>] ? dispose_list+0x4e/0xf9 [438109.214116] [<ffffffff802b837e>] ? invalidate_inodes+0xd1/0xef [438109.214116] [<ffffffff802a6f35>] ? generic_shutdown_super+0x39/0xf4 [438109.214116] [<ffffffff802a7017>] ? kill_anon_super+0x9/0x36 [438109.214116] [<ffffffff80351d2f>] ? nfs_kill_super+0x23/0x30 [438109.214116] [<ffffffff802a70be>] ? deactivate_super+0x5f/0x7e [438109.214116] [<ffffffff802a70c4>] ? deactivate_super+0x65/0x7e [438109.214116] [<ffffffff802bae35>] ? sys_umount+0x2d8/0x337 [438109.214116] [<ffffffff8020be2b>] ? system_call_fastpath+0x16/0x1b [438109.214116] </pre</pre>