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    SubjectRe: [Bugme-new] [Bug 7495] New: Kernel periodically hangs.
    On Sat, 11 Nov 2006 03:29:32 -0800
    bugme-daemon@bugzilla.kernel.org wrote:

    > http://bugzilla.kernel.org/show_bug.cgi?id=7495
    >
    > Summary: Kernel periodically hangs.
    > Kernel Version: Linux version 2.6.18.2 (root@pub) (gcc version 3.4.6)
    > #13 SMP Fr
    > Status: NEW
    > Severity: blocking
    > Owner: other_other@kernel-bugs.osdl.org
    > Submitter: alex@hausnet.ru
    >
    >
    > [42587.676000] BUG: unable to handle kernel NULL pointer dereference at
    > virtual address 0000003c
    > [42587.680000] printing eip:
    > [42587.680000] 781610e7
    > [42587.680000] *pde = 00000000
    > [42587.680000] Oops: 0000 [#1]
    > [42587.684000] SMP
    > [42587.684000] Modules linked in: sata_promise sk98lin 8250_pnp 8250
    > i2c_nforce2 ehci_hcd serial_core sata_nv ahci i2c_core ohci_hcd forcedeth
    > libata
    > [42587.688000] CPU: 1
    > [42587.688000] EIP: 0060:[<781610e7>] Not tainted VLI
    > [42587.688000] EFLAGS: 00010286 (2.6.18.2 #13)
    > [42587.692000] EIP is at clear_inode+0x96/0xce
    > [42587.692000] eax: 00000000 ebx: c0102240 ecx: f7f278d4 edx: f510d400
    > [42587.692000] esi: c0102384 edi: f7e6dec0 ebp: 00000070 esp: f7e6de98
    > [42587.696000] ds: 007b es: 007b ss: 0068
    > [42587.696000] Process kswapd0 (pid: 230, ti=f7e6c000 task=f7c03560
    > task.ti=f7e6c000)
    > [42587.696000] Stack: c0102248 c0102240 7816116a da7b4af0 da7b4af8 00000000
    > 00000080 781614a2
    > [42587.700000] 00000080 00000080 c01023f8 ef78dca8 00000000 00009858
    > 00000083 f7fee560
    > [42587.700000] 781614c8 7813a643 00261600 00000000 00009858 00000005
    > 00000000 00000000
    > [42587.700000] Call Trace:
    > [42587.704000] [<7816116a>] dispose_list+0x4b/0xc1
    > [42587.708000] [<781614a2>] prune_icache+0x17c/0x18e
    > [42587.708000] [<781614c8>] shrink_icache_memory+0x14/0x2b
    > [42587.708000] [<7813a643>] shrink_slab+0x130/0x18c
    > [42587.712000] [<7813b75a>] balance_pgdat+0x1ea/0x2dd
    > [42587.712000] [<7813b933>] kswapd+0xe6/0xe8
    > [42587.716000] [<781261dc>] kthread+0x7d/0xa1
    > [42587.716000] [<78100e05>] kernel_thread_helper+0x5/0xb

    I've seen three or four reports of oopses like this in 2.6.18. I have a
    suspision we broke something.


    > Kernel started with noapic option, cause it hands on load without this option.

    Him and a million other people. I know we broke APIC. Around 2.6.9, I
    think.

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