서버가 하루에 2~3번 다운되요...ㅜㅜ

안녕하세요.. 벌써 한달이나 이문제를 해결하려고 노력해 봤는데..도저히 해결이 안되네요... 도와주세요...ㅜㅜ

시스템이 완전히 다운되는것은 아니구요...ping은 되는데..kernel panic 현상같은게 나타납니다.

OS: CentOS4.2,

[root@www ~]# uname -a
Linux www.domain.com 2.6.9-22.0.1.EL #1 Thu Oct 27 12:26:11 CDT 2005 i686 i686 i386 GNU/Linux

/var/log/messages 에 다음과 같은 로그가 남습니다.

pc 조립한건데...cell 2.53G ,Mem 512M, HDD 120G 인데..

하드 배드체킹해도 하드 bad 도 나타나지않고..혹시 열이 발생하여 문제가 생기나 해서.. 쿨러도 더 붙이고 해봤습니다.IDC에 서버가 있구요..

메세지를 보시고..의심가는 부분이나 같은 경험있으신분 도와주세요..ㅜㅜ

부탁드립니다.

Jan 20 04:02:20 www kernel: ------------[ cut here ]------------
Jan 20 04:02:20 www kernel: kernel BUG at mm/rmap.c:479!
Jan 20 04:02:20 www kernel: invalid operand: 0000 [#1]
Jan 20 04:02:20 www kernel: Modules linked in: ipt_TOS ipt_REJECT ipt_TCPMSS ipt_state iptable_mangle iptable_nat iptable_filter ip_conntrack_ftp ip_tables ip_conntrack md5 ipv6 autofs4 dm_mirror dm_mod button battery ac uhci_hcd ehci_hcd i2c_prosavage i2c_algo_bit i2c_core snd_via82xx snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd_page_alloc snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore via_rhine mii floppy ext3 jbd
Jan 20 04:02:20 www kernel: CPU:    0Jan 20 04:02:20 www kernel: EIP:    0060:[<c015cfa3>]    Not tainted VLI
Jan 20 04:02:20 www kernel: EFLAGS: 00010286   (2.6.9-22.0.1.EL)
Jan 20 04:02:20 www kernel: EIP is at page_remove_rmap+0x22/0x36Jan 20 04:02:20 www kernel: eax: ffffffff   ebx: c12ba860   ecx: c12ba878   edx: c12ba860Jan 20 04:02:20 www kernel: esi: 00000000   edi: 00000000   ebp: ce01b048   esp: d2515decJan 20 04:02:20 www kernel: ds: 007b   es: 007b   ss: 0068Jan 20 04:02:20 www kernel: Process sendmail (pid: 28891, threadinfo=d2515000 task=d8da8800)Jan 20 04:02:20 www kernel: Stack: c0155c11 15d43025 00015000 00c12000 c03e7f74 00c12000 00c27000 d24f5010Jan 20 04:02:20 www kernel:        c03e7f74 c0155cb2 00015000 00000000 00c12000 d24f5010 00c27000 c03e7f74Jan 20 04:02:20 www kernel:        c0155d11 00015000 00000000 d2515e98 00c12000 d8db1aa4 00c27000 c0155e25Jan 20 04:02:20 www kernel: Call Trace:Jan 20 04:02:20 www kernel:  [<c0155c11>] zap_pte_range+0x1c0/0x21fJan 20 04:02:20 www kernel:  [<c0155cb2>] zap_pmd_range+0x42/0x65Jan 20 04:02:20 www kernel:  [<c0155d11>] unmap_page_range+0x3c/0x5fJan 20 04:02:20 www kernel:  [<c0155e25>] unmap_vmas+0xf1/0x1df
Jan 20 04:02:20 www kernel:  [<c015ade6>] exit_mmap+0xb8/0x1cf
Jan 20 04:02:20 www kernel:  [<c011e8ce>] mmput+0xb3/0xd6
Jan 20 04:02:20 www kernel:  [<c0123f40>] do_exit+0x238/0x577
Jan 20 04:02:20 www kernel:  [<c0124417>] sys_exit_group+0x0/0xd
Jan 20 04:02:20 www kernel:  [<c012ee50>] get_signal_to_deliver+0x6fa/0x7a3Jan 20 04:02:20 www kernel:  [<c01062a1>] do_signal+0x55/0xd9
Jan 20 04:02:20 www kernel:  [<c030e2b5>] schedule_timeout+0xf8/0x10cJan 20 04:02:20 www kernel:  [<c012c3fb>] signal_wake_up+0x18/0x19
Jan 20 04:02:20 www kernel:  [<c012ca5d>] specific_send_sig_info+0x86/0x8d
Jan 20 04:02:20 www kernel:  [<c0107358>] do_general_protection+0x31f/0x3a4Jan 20 04:02:20 www kernel:  [<c017d35d>] sys_poll+0x240/0x24f
Jan 20 04:02:20 www kernel:  [<c017c6fd>] __pollwait+0x0/0x94Jan 20 04:02:20 www kernel:  [<c0107039>] do_general_protection+0x0/0x3a4
Jan 20 04:02:20 www kernel:  [<c010634c>] do_notify_resume+0x27/0x37Jan 20 04:02:20 www kernel:  [<c030f916>] work_notifysig+0x13/0x15Jan 20 04:02:20 www kernel: Code: ff 05 f0 da 40 c0 50 9d c3 89 c2 8b 00 f6 c4 08 74 08 0f 0b dc 01 e4 10 32 c0 83 42 08 ff 0f 98 c0 84 c0 74 19 8b 42 08 40 79 08 <0f> 0b df 01 e4 10 32 c0 9c 58 fa ff 0d f0 da 40 c0 50 9d c3 55
Jan 20 04:02:20 www kernel:  <0>Fatal exception: panic in 5 seconds
Jan 20 04:02:20 www kernel: bad: scheduling while atomic!
Jan 20 04:02:20 www kernel:  [<c030d3b5>] schedule+0x2d/0x552
Jan 20 04:02:20 www kernel:  [<c0233621>] poke_blanked_console+0x8f/0x9a
Jan 20 04:02:20 www kernel:  [<c0232a51>] vt_console_print+0x293/0x2a3
Jan 20 04:02:20 www kernel:  [<c030e2ae>] schedule_timeout+0xf1/0x10c
Jan 20 04:02:20 www kernel:  [<c012ad65>] process_timeout+0x0/0x5
Jan 20 04:02:20 www kernel:  [<c01215ef>] printk+0xe/0x11
Jan 20 04:02:20 www kernel:  [<c010690c>] die+0x21a/0x22b
Jan 20 04:02:20 www kernel:  [<c013614b>] search_exception_tables+0x1f/0x21
Jan 20 04:02:20 www kernel:  [<c0106c6f>] do_invalid_op+0xcf/0xf2
Jan 20 04:02:20 www kernel:  [<c015cfa3>] page_remove_rmap+0x22/0x36
Jan 20 04:02:20 www kernel:  [<c030e078>] __cond_resched+0x14/0x3b
Jan 20 04:02:21 www kernel:  [<c0106ba0>] do_invalid_op+0x0/0xf2
Jan 20 04:02:21 www kernel:  [<c030fa4f>] error_code+0x2f/0x38
Jan 20 04:02:21 www kernel:  [<c015cfa3>] page_remove_rmap+0x22/0x36
Jan 20 04:02:21 www kernel:  [<c0155c11>] zap_pte_range+0x1c0/0x21f
Jan 20 04:02:21 www kernel:  [<c0155cb2>] zap_pmd_range+0x42/0x65
Jan 20 04:02:21 www kernel:  [<c0155d11>] unmap_page_range+0x3c/0x5f
Jan 20 04:02:21 www kernel:  [<c0155e25>] unmap_vmas+0xf1/0x1dfJan 20 04:02:21 www kernel:  [<c015ade6>] exit_mmap+0xb8/0x1cfJan 20 04:02:21 www kernel:  [<c011e8ce>] mmput+0xb3/0xd6
Jan 20 04:02:21 www kernel:  [<c0123f40>] do_exit+0x238/0x577
Jan 20 04:02:21 www kernel:  [<c0124417>] sys_exit_group+0x0/0xd
Jan 20 04:02:21 www kernel:  [<c012ee50>] get_signal_to_deliver+0x6fa/0x7a3
Jan 20 04:02:21 www kernel:  [<c01062a1>] do_signal+0x55/0xd9
Jan 20 04:02:21 www kernel:  [<c030e2b5>] schedule_timeout+0xf8/0x10c
Jan 20 04:02:21 www kernel:  [<c012c3fb>] signal_wake_up+0x18/0x19
Jan 20 04:02:21 www kernel:  [<c012ca5d>] specific_send_sig_info+0x86/0x8d
Jan 20 04:02:21 www kernel:  [<c0107358>] do_general_protection+0x31f/0x3a4
Jan 20 04:02:21 www kernel:  [<c017d35d>] sys_poll+0x240/0x24f
Jan 20 04:02:21 www kernel:  [<c017c6fd>] __pollwait+0x0/0x94
Jan 20 04:02:21 www kernel:  [<c0107039>] do_general_protection+0x0/0x3a4
Jan 20 04:02:21 www kernel:  [<c010634c>] do_notify_resume+0x27/0x37
Jan 20 04:02:21 www kernel:  [<c030f916>] work_notifysig+0x13/0x15