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Old 03-24-2010, 08:20 AM   #1
nike.stars
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Registered: Jun 2009
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Bad pte problem - causing server crash


i'm running an centos-openvz server which having a problem being crash after a few hours, i've been checked /var/log/messages and found out some anomalities like this:

Quote:
================================================================
Mar 24 02:01:10 usanode1 kernel: swap_dup: Bad swap file entry b9190673
Mar 24 02:01:10 usanode1 kernel: swap_dup: Bad swap file entry b9190673
Mar 24 02:01:10 usanode1 kernel: Bad pte = 9dc7d00ceab7c25b, process = ???, vm_flags = 100173, vaddr = bfcd3000
Mar 24 02:01:10 usanode1 kernel: [] vm_normal_page+0x7d/0x96
Mar 24 02:01:10 usanode1 kernel: [] unmap_vmas+0x241/0x681
Mar 24 02:01:10 usanode1 kernel: [] exit_mmap+0x77/0xf1
Mar 24 02:01:10 usanode1 kernel: [] mmput+0x25/0x8e
Mar 24 02:01:10 usanode1 kernel: [] do_exit+0x573/0xb86
Mar 24 02:01:10 usanode1 kernel: [] printk+0x18/0x8e
Mar 24 02:01:10 usanode1 kernel: [] ub_slab_uncharge+0x82/0x8c
Mar 24 02:01:10 usanode1 kernel: [] __dequeue_signal+0x111/0x15f
Mar 24 02:01:10 usanode1 kernel: [] sys_exit_group+0x0/0xd
Mar 24 02:01:10 usanode1 kernel: [] do_page_fault+0x0/0x5e1
Mar 24 02:01:10 usanode1 kernel: [] get_signal_to_deliver+0x38d/0x3b4
Mar 24 02:01:10 usanode1 kernel: [] do_page_fault+0x0/0x5e1
Mar 24 02:01:10 usanode1 kernel: [] do_notify_resume+0xa9/0x6a5
Mar 24 02:01:10 usanode1 kernel: [] ub_siginfo_charge+0x8f/0xec
Mar 24 02:01:10 usanode1 kernel: [] signal_wake_up+0x1e/0x2c
Mar 24 02:01:10 usanode1 kernel: [] specific_send_sig_info+0x90/0x9a
Mar 24 02:01:10 usanode1 kernel: [] force_sig_info+0x7e/0x86
Mar 24 02:01:10 usanode1 kernel: [] do_page_fault+0x55d/0x5e1
Mar 24 02:01:10 usanode1 kernel: [] audit_syscall_entry+0x160/0x192
Mar 24 02:01:10 usanode1 kernel: [] do_page_fault+0x0/0x5e1
Mar 24 02:01:10 usanode1 kernel: [] work_notifysig+0x13/0x19
Mar 24 02:01:10 usanode1 kernel: [] __register_kprobe+0x260/0x270
Mar 24 02:01:10 usanode1 kernel: =======================

=======================================================================

Mar 24 04:35:01 usanode1 kernel: Bad pte = fe08bd805874c085, process = ???, vm_flags = 100173, vaddr = bfc7aacd
Mar 24 04:35:01 usanode1 kernel: [] vm_normal_page+0x7d/0x96
Mar 24 04:35:01 usanode1 kernel: [] follow_page+0x160/0x24b
Mar 24 04:35:01 usanode1 kernel: [] get_user_pages+0x2b2/0x344
Mar 24 04:35:01 usanode1 kernel: [] access_process_vm+0x65/0x119
Mar 24 04:35:01 usanode1 kernel: [] proc_pid_cmdline+0x4e/0xd6
Mar 24 04:35:01 usanode1 kernel: [] proc_info_read+0x49/0x96
Mar 24 04:35:01 usanode1 kernel: [] proc_info_read+0x0/0x96
Mar 24 04:35:01 usanode1 kernel: [] vfs_read+0x81/0x123
Mar 24 04:35:01 usanode1 kernel: [] sys_read+0x3c/0x9e
Mar 24 04:35:01 usanode1 kernel: [] syscall_call+0x7/0xb
Mar 24 04:35:01 usanode1 kernel: [] debug_esp_fix_insn+0x2/0xf
Mar 24 04:35:01 usanode1 kernel: =======================
Mar 24 04:35:04 usanode1 kernel: Bad pte = fe08bd805874c085, process = ???, vm_flags = 100173, vaddr = bfc7aacd
Mar 24 04:35:04 usanode1 kernel: [] vm_normal_page+0x7d/0x96
Mar 24 04:35:04 usanode1 kernel: [] follow_page+0x160/0x24b
Mar 24 04:35:04 usanode1 kernel: [] get_user_pages+0x2b2/0x344
Mar 24 04:35:04 usanode1 kernel: [] access_process_vm+0x65/0x119
Mar 24 04:35:04 usanode1 kernel: [] proc_pid_cmdline+0x4e/0xd6
Mar 24 04:35:04 usanode1 kernel: [] proc_info_read+0x49/0x96
Mar 24 04:35:04 usanode1 kernel: [] proc_info_read+0x0/0x96
Mar 24 04:35:04 usanode1 kernel: [] vfs_read+0x81/0x123
Mar 24 04:35:04 usanode1 kernel: [] sys_read+0x3c/0x9e
Mar 24 04:35:04 usanode1 kernel: [] syscall_call+0x7/0xb
Mar 24 04:35:04 usanode1 kernel: [] debug_esp_fix_insn+0x2/0xf
================================================================
i'm suspecting this is maybe related to memory problem, but just wanted to be sure if maybe anyone have similiar experiences?

my current kernel: 2.6.18-164.11.1.el5.028stab068.5PAE #1 SMP Mon Mar 15 19:32:34 MSK 2010 i686 i686 i386 GNU/Linux

Last edited by nike.stars; 03-24-2010 at 08:21 AM. Reason: revision
 
Old 03-25-2010, 05:07 AM   #2
business_kid
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Location: Ireland
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http://lists.us.dell.com/pipermail/l...ne/014879.html
That guy seems pretty confident.
I would try a boot option of 'noapic' to see if it helps things. By all means run swapoff, mkswap, and swapon with your swap partition as an argument, and run memtest. Report back.
 
  


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