Can anyone tell me why are this crash??

first:
May 11 07:40:04 panda kernel: Unable to handle kernel paging request at virtual address 00b82ea4
May 11 07:40:04 panda kernel: printing eip:
May 11 07:40:04 panda kernel: c0154164
May 11 07:40:04 panda kernel: *pde = 00000000
May 11 07:40:04 panda kernel: Oops: 0002 [#1]
May 11 07:40:04 panda kernel: Modules linked in: binfmt_misc ppp_async ppp_deflate ppp_mppe ppp_synctty pppoe pppox ppp_generic slhc
May 11 07:40:04 panda kernel: CPU: 0
May 11 07:40:04 panda kernel: EIP: 0060:[shrink_icache_memory+271/411] Not tainted VLI
May 11 07:40:04 panda kernel: EFLAGS: 00010246 (2.6.16.14 #4)
May 11 07:40:04 panda kernel: EIP is at shrink_icache_memory+0x10f/0x19b
May 11 07:40:04 panda kernel: eax: 00b82ea4 ebx: dd1066c0 ecx: c03cabf4 edx: dd1066c8
May 11 07:40:04 panda kernel: esi: dd1066c8 edi: 00000000 ebp: 00000065 esp: f7c61f04
May 11 07:40:04 panda kernel: ds: 007b es: 007b ss: 0068
May 11 07:40:04 panda kernel: Process kswapd0 (pid: 143, threadinfo=f7c60000 task=f7c29070)
May 11 07:40:04 panda kernel: Stack: <0>00000065 dd1069e0 f2d906e8 000121d8 c18deae0 00000098 00000064 c01306e7
May 11 07:40:04 panda kernel: 00000080 000000d0 00000000 000000d0 00487600 00000000 00487600 00000080
May 11 07:40:04 panda kernel: c03c9760 00000002 00000000 c03c9760 c0131664 00000000 000000d0 000256d7
May 11 07:40:04 panda kernel: Call Trace:
May 11 07:40:04 panda kernel: [shrink_slab+219/320] shrink_slab+0xdb/0x140
May 11 07:40:04 panda kernel: [balance_pgdat+518/809] balance_pgdat+0x206/0x329
May 11 07:40:04 panda kernel: [kswapd+200/202] kswapd+0xc8/0xca
May 11 07:40:04 panda kernel: [autoremove_wake_function+0/58] autoremove_wake_function+0x0/0x3a
May 11 07:40:04 panda kernel: [kswapd+0/202] kswapd+0x0/0xca
May 11 07:40:04 panda kernel: [kernel_thread_helper+5/11] kernel_thread_helper+0x5/0xb
May 11 07:40:04 panda kernel: Code: 00 00 75 48 53 e8 eb df fe ff 85 c0 5a 75 3d 8b 43 24 85 c0 75 36 83 bb c4 00 00 00 00 75 2d 8d 53 08 8b 4b 08 8b 42 04 89 41 04 <89> 08 8b 44 24 04 89 50 04 89 43 08 8d 44 24 04 89 54 24 04 89

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and today:

May 15 04:53:29 panda kernel: Unable to handle kernel paging request at virtual address 73f702c0 May 15 04:53:29 panda kernel: printing eip:
May 15 04:53:29 panda kernel: c018d16b May 15 04:53:29 panda kernel: *pde = 00000000
May 15 04:53:29 panda kernel: Oops: 0002 [#1] May 15 04:53:29 panda kernel: Modules linked in: binfmt_misc ppp_async ppp_deflate ppp_mppe ppp_synctty pppoe pppox ppp_gener
ic slhc May 15 04:53:29 panda kernel: CPU: 0
May 15 04:53:29 panda kernel: EIP: 0060:[do_journal_end+2019/2688] Not tainted VLI May 15 04:53:29 panda kernel: EFLAGS: 00210202 (2.6.16.14 #4)
May 15 04:53:29 panda kernel: EIP is at do_journal_end+0x7e3/0xa80 May 15 04:53:29 panda kernel: eax: 00001a85 ebx: 00000000 ecx: eace0c68 edx: f89c6000
May 15 04:53:29 panda kernel: esi: f89c60d4 edi: f77bf800 ebp: 00000000 esp: c1b4fe90 May 15 04:53:29 panda kernel: ds: 007b es: 007b ss: 0068
May 15 04:53:29 panda kernel: Process pdflush (pid: 142, threadinfo=c1b4e000 task=f7c29590) May 15 04:53:29 panda kernel: Stack: <0>db5aeab4 00000400 00000000 f77bf800 c1b4ff04 018c4b49 f89c6000 da7bd000
May 15 04:53:29 panda kernel: c9cd6664 00001a81 00000005 00000000 00000004 eace0da0 00000006 00397f64 May 15 04:53:29 panda kernel: 000003fa 00000004 f89ce10c c9cd6604 c16646c0 f77bf800 c1b4ff04 f77bf848
May 15 04:53:29 panda kernel: Call Trace: May 15 04:53:29 panda kernel: [pdflush+0/362] pdflush+0x0/0x16a
May 15 04:53:29 panda kernel: [reiserfs_sync_fs+44/70] reiserfs_sync_fs+0x2c/0x46 May 15 04:53:29 panda kernel: [reiserfs_write_super+11/14] reiserfs_write_super+0xb/0xe
May 15 04:53:29 panda kernel: [sync_supers+83/155] sync_supers+0x53/0x9b May 15 04:53:29 panda kernel: [wb_kupdate+42/251] wb_kupdate+0x2a/0xfb
May 15 04:53:29 panda kernel: [schedule+1108/1217] schedule+0x454/0x4c1 May 15 04:53:29 panda kernel: [pdflush+210/362] pdflush+0xd2/0x16a
May 15 04:53:29 panda kernel: [wb_kupdate+0/251] wb_kupdate+0x0/0xfb May 15 04:53:29 panda kernel: [kthread+148/193] kthread+0x94/0xc1
May 15 04:53:29 panda kernel: [kthread+0/193] kthread+0x0/0xc1 May 15 04:53:29 panda kernel: [kernel_thread_helper+5/11] kernel_thread_helper+0x5/0xb
May 15 04:53:29 panda kernel: Code: 04 8b 5c 24 34 89 4a 04 89 43 48 89 11 ff 87 b8 00 00 00 8b 47 28 8b 7c 24 0c 8b 97 50 01 00 00 8b 5a 04 8b 54 24 18 03 42 24 31 <d2> 83 c0 02 f7 73 14 8b 5c 24 18 c7 43 30 00 00 00 00 c7 43 34
May 15 04:53:29 panda kernel: Badness in do_exit at kernel/exit.c:802
May 15 04:53:29 panda kernel: [do_exit+60/1583] do_exit+0x3c/0x62f
May 15 04:53:29 panda kernel: [printk+18/22] printk+0x12/0x16
May 15 04:53:29 panda kernel: [do_simd_coprocessor_error+0/355] do_simd_coprocessor_error+0x0/0x163
May 15 04:53:29 panda kernel: [do_page_fault+0/1188] do_page_fault+0x0/0x4a4
May 15 04:53:29 panda kernel: [do_page_fault+891/1188] do_page_fault+0x37b/0x4a4
May 15 04:53:29 panda kernel: [do_page_fault+0/1188] do_page_fault+0x0/0x4a4
May 15 04:53:29 panda kernel: [error_code+79/84] error_code+0x4f/0x54
May 15 04:53:29 panda kernel: [do_journal_end+2019/2688] do_journal_end+0x7e3/0xa80
May 15 04:53:29 panda kernel: [pdflush+0/362] pdflush+0x0/0x16a
May 15 04:53:29 panda kernel: [reiserfs_sync_fs+44/70] reiserfs_sync_fs+0x2c/0x46
May 15 04:53:29 panda kernel: [reiserfs_write_super+11/14] reiserfs_write_super+0xb/0xe
May 15 04:53:29 panda kernel: [sync_supers+83/155] sync_supers+0x53/0x9b
May 15 04:53:29 panda kernel: [wb_kupdate+42/251] wb_kupdate+0x2a/0xfb
May 15 04:53:29 panda kernel: [schedule+1108/1217] schedule+0x454/0x4c1
May 15 04:53:29 panda kernel: [pdflush+210/362] pdflush+0xd2/0x16a
May 15 04:53:29 panda kernel: [wb_kupdate+0/251] wb_kupdate+0x0/0xfb
May 15 04:53:29 panda kernel: [kthread+148/193] kthread+0x94/0xc1
May 15 04:53:29 panda kernel: [kthread+0/193] kthread+0x0/0xc1
May 15 04:53:29 panda kernel: [kernel_thread_helper+5/11] kernel_thread_helper+0x5/0xb

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At the moment i'll try new 2.6.16.16, but still i want to know what happened??