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Subjectkernel 3.0: BUG: soft lockup: find_get_pages+0x51/0x110
Hello,

What causes this(?) -- am I out of memory(?) or is this a kernel bug?

[104147.717815] BUG: soft lockup - CPU#13 stuck for 23s! [kswapd0:934]
[104147.717820] Modules linked in: dm_mod tcp_diag parport_pc ppdev lp parport inet_diag ub pl2303 ftdi_sio snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_usbmidi_lib snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore usbserial cdc_acm nouveau serio_raw ttm drm_kms_helper drm agpgart i2c_algo_bit mxm_wmi wmi i7core_edac edac_core video
[104147.717872] CPU 13
[104147.717874] Modules linked in: dm_mod tcp_diag parport_pc ppdev lp parport inet_diag ub pl2303 ftdi_sio snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_usbmidi_lib snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore usbserial cdc_acm nouveau serio_raw ttm drm_kms_helper drm agpgart i2c_algo_bit mxm_wmi wmi i7core_edac edac_core video
[104147.717916]
[104147.717921] Pid: 934, comm: kswapd0 Not tainted 3.0.0 #4 Supermicro X8DTH-i/6/iF/6F/X8DTH
[104147.717928] RIP: 0010:[<ffffffff81081f71>] [<ffffffff81081f71>] find_get_pages+0x51/0x110
[104147.717940] RSP: 0018:ffff880626127ba0 EFLAGS: 00000246
[104147.717944] RAX: ffff8800b5e94d10 RBX: ffff880626127b68 RCX: 000000000000000e
[104147.717948] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffea001b29c8e8
[104147.717952] RBP: 0000000000000cd7 R08: 0000000000000001 R09: ffffea001acce040
[104147.717955] R10: 0000000000000001 R11: ffff8800ad03b930 R12: ffffffff815b47ce
[104147.717959] R13: ffffea001ec13740 R14: ffff880626127dc0 R15: ffffffff81087ce4
[104147.717964] FS: 0000000000000000(0000) GS:ffff88063fce0000(0000) knlGS:0000000000000000
[104147.717969] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[104147.717973] CR2: 000000007ddf2000 CR3: 0000000001843000 CR4: 00000000000006e0
[104147.717976] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[104147.717979] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[104147.717983] Process kswapd0 (pid: 934, threadinfo ffff880626126000, task ffff880626125810)
[104147.717986] Stack:
[104147.717988] 0000000000000001 ffffffff810807fe ffff8800463ed6d8 ffff880626127c10
[104147.717998] 00000000000000a9 ffffffffffffffff ffff8800463ed6d8 ffffea001ec13740
[104147.718007] 0000000000000002 ffffffff81089e15 0000000000000cd7 ffffffff8108b905
[104147.718015] Call Trace:
[104147.718023] [<ffffffff810807fe>] ? __delete_from_page_cache+0x3e/0xe0
[104147.718030] [<ffffffff81089e15>] ? pagevec_lookup+0x15/0x20
[104147.718036] [<ffffffff8108b905>] ? invalidate_mapping_pages+0x55/0x130
[104147.718045] [<ffffffff810d6835>] ? shrink_icache_memory+0x2c5/0x310
[104147.718052] [<ffffffff8108c254>] ? shrink_slab+0x104/0x170
[104147.718058] [<ffffffff8108eda2>] ? balance_pgdat+0x492/0x600
[104147.718064] [<ffffffff8108efbc>] ? kswapd+0xac/0x250
[104147.718071] [<ffffffff81050fd0>] ? abort_exclusive_wait+0xb0/0xb0
[104147.718077] [<ffffffff8108ef10>] ? balance_pgdat+0x600/0x600
[104147.718082] [<ffffffff8105082e>] ? kthread+0x7e/0x90
[104147.718090] [<ffffffff815b4e14>] ? kernel_thread_helper+0x4/0x10
[104147.718096] [<ffffffff810507b0>] ? kthread_worker_fn+0x120/0x120
[104147.718102] [<ffffffff815b4e10>] ? gs_change+0xb/0xb
[104147.718105] Code: e7 e8 f4 8b 25 00 85 c0 89 c1 0f 84 ba 00 00 00 49 89 df 31 d2 45 31 f6 66 90 49 8b 07 48 8b 38 48 85 ff 74 3a 40 f6 c7 01 75 57 <8b> 77 08 85 f6 74 ee 44 8d 46 01 89 f0 4c 8d 4f 08 f0 44 0f b1
[104147.718149] Call Trace:
[104147.718155] [<ffffffff810807fe>] ? __delete_from_page_cache+0x3e/0xe0
[104147.718161] [<ffffffff81089e15>] ? pagevec_lookup+0x15/0x20
[104147.718167] [<ffffffff8108b905>] ? invalidate_mapping_pages+0x55/0x130
[104147.718174] [<ffffffff810d6835>] ? shrink_icache_memory+0x2c5/0x310
[104147.718180] [<ffffffff8108c254>] ? shrink_slab+0x104/0x170
[104147.718186] [<ffffffff8108eda2>] ? balance_pgdat+0x492/0x600
[104147.718193] [<ffffffff8108efbc>] ? kswapd+0xac/0x250
[104147.718199] [<ffffffff81050fd0>] ? abort_exclusive_wait+0xb0/0xb0
[104147.718206] [<ffffffff8108ef10>] ? balance_pgdat+0x600/0x600
[104147.718211] [<ffffffff8105082e>] ? kthread+0x7e/0x90
[104147.718217] [<ffffffff815b4e14>] ? kernel_thread_helper+0x4/0x10
[104147.718224] [<ffffffff810507b0>] ? kthread_worker_fn+0x120/0x120
[104147.718229] [<ffffffff815b4e10>] ? gs_change+0xb/0xb

Justin.



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