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    Subject2.6.6 Oops on kswapd
    Hello linux-kernel

    First question is, how to use correctly ksymoops on 2.6.X? What about
    -k parametr?

    Anyway, below is oops from 2.6.6 on i686 (3 hours after reboot) (Pentium
    4), 525MB RAM, 700MB Swap area, ide disks, ext3 & ext2 area. Linux Fedora Core
    1. With 2.6.4 that machine has worked 30 days without any problems.

    ksymoops 2.4.9 on i686 2.6.6. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.6.6/ (default)
    -m /lib/modules/2.6.6/System.map (specified)

    Error (regular_file): read_ksyms stat /proc/ksyms failed
    No modules in ksyms, skipping objects
    No ksyms, skipping lsmod
    May 11 02:31:43 space-themes kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
    May 11 02:31:43 space-themes kernel: 00000000
    May 11 02:31:43 space-themes kernel: *pde = 00000000
    May 11 02:31:43 space-themes kernel: Oops: 0000 [#1]
    May 11 02:31:43 space-themes kernel: CPU: 0
    May 11 02:31:43 space-themes kernel: EIP: 0060:[<00000000>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    May 11 02:31:43 space-themes kernel: EFLAGS: 00010246 (2.6.6)
    May 11 02:31:43 space-themes kernel: eax: c03bedb8 ebx: df96a000 ecx: df96a0a4 edx: df96a0a0
    May 11 02:31:43 space-themes kernel: esi: df79e9b0 edi: df79e990 ebp: c1561d4c esp: c1561d28
    May 11 02:31:43 space-themes kernel: ds: 007b es: 007b ss: 0068
    May 11 02:31:43 space-themes kernel: Stack: c0184e12 df79e990 00000077 df96a0a4 df96a0a0 00000000 df79e990 c1560000
    May 11 02:31:43 space-themes kernel: de08b8f0 c1561d6c c018538f df79e990 c13b73a0 00000286 c13b7360 00000000
    May 11 02:31:43 space-themes kernel: df96a0cc c1561d88 c01860b8 df79e990 00000042 de08b8f0 c1561dd8 00000020
    May 11 02:31:43 space-themes kernel: Call Trace:
    May 11 02:31:43 space-themes kernel: [<c0184e12>] dquot_release+0xad/0xc8
    May 11 02:31:43 space-themes kernel: [<c018538f>] dqput+0xd7/0x1ec
    May 11 02:31:43 space-themes kernel: [<c01860b8>] dquot_drop+0x95/0xa2
    May 11 02:31:43 space-themes kernel: [<c016faa1>] clear_inode+0x62/0xcd
    May 11 02:31:43 space-themes kernel: [<c016fb4f>] dispose_list+0x43/0xc5
    May 11 02:31:43 space-themes kernel: [<c016ff22>] prune_icache+0xf1/0x26e
    May 11 02:31:43 space-themes kernel: [<c01700c3>] shrink_icache_memory+0x24/0x26
    May 11 02:31:43 space-themes kernel: [<c01426ba>] shrink_slab+0x142/0x18a
    May 11 02:31:43 space-themes kernel: [<c0143d8b>] balance_pgdat+0x207/0x268
    May 11 02:31:43 space-themes kernel: [<c0143eea>] kswapd+0xfe/0x11f
    May 11 02:31:43 space-themes kernel: [<c011b337>] autoremove_wake_function+0x0/0x4b
    May 11 02:31:43 space-themes kernel: [<c0104f3a>] ret_from_fork+0x6/0x14
    May 11 02:31:43 space-themes kernel: [<c011b337>] autoremove_wake_function+0x0/0x4b
    Warning (Oops_read): Code line not seen, dumping what data is available


    >>EIP; 00000000 Before first symbol

    >>eax; c03bedb8 <v1_format_ops+0/1c>
    >>ebx; df96a000 <__crc_fs_overflowgid+40c90/13130f>
    >>ecx; df96a0a4 <__crc_fs_overflowgid+40d34/13130f>
    >>edx; df96a0a0 <__crc_fs_overflowgid+40d30/13130f>
    >>esi; df79e9b0 <__crc_hpsb_write+8a13/11bef2>
    >>edi; df79e990 <__crc_hpsb_write+89f3/11bef2>
    >>ebp; c1561d4c <__crc_find_inode_number+f0429/4bbb6e>
    >>esp; c1561d28 <__crc_find_inode_number+f0405/4bbb6e>

    Trace; c0184e12 <dquot_release+ad/c8>
    Trace; c018538f <dqput+d7/1ec>
    Trace; c01860b8 <dquot_drop+95/a2>
    Trace; c016faa1 <clear_inode+62/cd>
    Trace; c016fb4f <dispose_list+43/c5>
    Trace; c016ff22 <prune_icache+f1/26e>
    Trace; c01700c3 <shrink_icache_memory+24/26>
    Trace; c01426ba <shrink_slab+142/18a>
    Trace; c0143d8b <balance_pgdat+207/268>
    Trace; c0143eea <kswapd+fe/11f>
    Trace; c011b337 <autoremove_wake_function+0/4b>
    Trace; c0104f3a <ret_from_fork+6/14>
    Trace; c011b337 <autoremove_wake_function+0/4b>


    1 warning and 1 error issued. Results may not be reliable.

    --
    *[ Łukasz Trąbiński ]*
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