[Bug 658491] [NEW] kernel BUG at /build/buildd/linux-2.6.35/lib/prio_tree.c:332

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This has cropped up in dmesg this afternoon. System now appears to be
very sluggish

[80997.558403] ------------[ cut here ]------------
[80997.559346] kernel BUG at /build/buildd/linux-2.6.35/lib/prio_tree.c:332!
[80997.560019] invalid opcode: 0000 [#1] SMP 
[80997.560019] last sysfs file: /sys/devices/virtual/block/md0/md/mismatch_cnt
[80997.560019] Modules linked in: reiserfs sha256_generic aes_i586 aes_generic dm_crypt ppdev xfs parport_pc lp exportfs shpchp parport serio_raw i2c_sis96x raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid0 multipath linear raid1 nouveau ttm 8139too drm_kms_helper drm usbhid sis_agp 8139cp sata_sil hid i2c_algo_bit agpgart mii
[80997.560019] 
[80997.560019] Pid: 26, comm: kswapd0 Tainted: G    B       2.6.35-22-generic #33-Ubuntu P4S333/System Name
[80997.560019] EIP: 0060:[<c03532b3>] EFLAGS: 00010202 CPU: 0
[80997.560019] EIP is at prio_tree_left+0xc3/0xd0
[80997.560019] EAX: dfaa9cd4 EBX: ddbd5e70 ECX: 00000020 EDX: ddbd6388
[80997.560019] ESI: ddbd6360 EDI: dfaa9c94 EBP: dfaa9c88 ESP: dfaa9c80
[80997.560019]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[80997.560019] Process kswapd0 (pid: 26, ti=dfaa8000 task=df903f70 task.ti=dfaa8000)
[80997.560019] Stack:
[80997.560019]  dfaa9cd4 dfaa9c90 dfaa9cac c035359b ddcd4026 ddbd5e70 0000000b 00000001
[80997.560019] <0> 00000000 c52c52e0 00000000 dfaa9cb4 c01ea92c dfaa9d00 c01faf02 c5d8f380
[80997.560019] <0> c07d4c00 00000a57 dfaa9dac dd4f8b28 00000000 ddbd6388 00000000 00000000
[80997.560019] Call Trace:
[80997.560019]  [<c035359b>] ? prio_tree_next+0x1eb/0x220
[80997.560019]  [<c01ea92c>] ? vma_prio_tree_next+0x3c/0x50
[80997.560019]  [<c01faf02>] ? page_referenced_file+0x72/0xf0
[80997.560019]  [<c01fb3c7>] ? page_referenced+0x67/0x1d0
[80997.560019]  [<c01e5475>] ? shrink_page_list+0x135/0x480
[80997.560019]  [<c02106d3>] ? mem_cgroup_del_lru_list+0x23/0x80
[80997.560019]  [<c02107a5>] ? mem_cgroup_del_lru+0x35/0x40
[80997.560019]  [<c01e4272>] ? isolate_lru_pages+0x1c2/0x1f0
[80997.560019]  [<c01e5a48>] ? shrink_inactive_list+0x288/0x6a0
[80997.560019]  [<c01e5fd9>] ? shrink_zone+0x179/0x210
[80997.560019]  [<c01e6b66>] ? balance_pgdat+0x4a6/0x540
[80997.560019]  [<c0165f7f>] ? finish_wait+0x4f/0x70
[80997.560019]  [<c01e6cf0>] ? kswapd+0xf0/0x270
[80997.560019]  [<c0165e10>] ? autoremove_wake_function+0x0/0x50
[80997.560019]  [<c01e6c00>] ? kswapd+0x0/0x270
[80997.560019]  [<c01659e4>] ? kthread+0x74/0x80
[80997.560019]  [<c0165970>] ? kthread+0x0/0x80
[80997.560019]  [<c010363e>] ? kernel_thread_helper+0x6/0x10
[80997.560019] Code: 83 c1 01 89 48 0c c7 40 04 ff ff ff ff e9 6d ff ff ff 8d b6 00 00 00 00 c7 40 0c 01 00 00 00 c7 40 04 00 00 00 80 e9 54 ff ff ff <0f> 0b eb fe 0f 0b eb fe 90 8d 74 26 00 55 89 e5 83 ec 0c 89 1c 
[80997.560019] EIP: [<c03532b3>] prio_tree_left+0xc3/0xd0 SS:ESP 0068:dfaa9c80
[80997.560019] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[80997.613687] ---[ end trace 26036ac110687b1c ]---


xxx at hfw1:/raid/array1/Simon$ lsb_release -rd
Description:	Ubuntu 10.10
Release:	10.10

uname -a
Linux hfw1 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
kernel BUG at /build/buildd/linux-2.6.35/lib/prio_tree.c:332
https://bugs.edge.launchpad.net/bugs/658491
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