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    SubjectRe: Kexec on 2.5.59 problems ?
    I am using the OSDL versions of the kexec patches for
    2.5.59 (plm 1442 and 1444) for lkcd-kexec based crash dump
    work. So far I had only been trying the cases where
    machine_kexec was being invoked directly from (safe)
    panics, which worked, i.e. it could successfully kexec and
    save dumps generated via artificially induced panics on
    a system that's not doing very much (Not considering harder
    cases or for the moment).

    Surprisingly though, when I tried just a simple
    kexec -e today (having loaded the kernel earlier on),
    I ran into the following Oops, consistently:

    I'm using kexec-tools-1.8, and this has worked for me
    earlier. The test system is a 4way SMP machine.

    Has anyone seen this as well ? (I'd already issued init 1
    and unmounted filesystems by this point)

    sh-2.05a# /sbin/kexec -e
    Synchronizing SCSI caches:
    Shutting down devices
    Starting new kernel
    Unable to handle kernel paging request at virtual address 361ae000
    printing eip:
    *pde = 00000000
    Oops: 0002
    CPU: 0
    EIP: 0060:[<c011470a>] Not tainted
    EFLAGS: 00010003
    EIP is at machine_kexec+0x14a/0x190
    eax: 00000097 ebx: f7742260 ecx: 00000025 edx: 361ac000
    esi: c0114750 edi: 361ae000 ebp: f7365e94 esp: f7365e80
    ds: 007b es: 007b ss: 0068

    Process kexec (pid: 1685, threadinfo=f7364000 task=f6290060)
    Stack: 361ae000 361ac000 f7742260 f7364000 00000000 f7365fbc
    c0126903 f7742260 c02a71af c03a9aa8 00000001 00000000 f7fe1640
    f7793ec0 c1b3b120 f7364000 00000001 f7365edc c014dbef f7fe1668
    f7fe1668 00000286 f7ff51e0 f7365efc

    Call Trace:
    [<c0126903>] sys_reboot+0x363/0x400
    [<c014dbef>] invalidate_inode_buffers+0xf/0x90
    [<c01633b0>] clear_inode+0x10/0xb0
    [<c0238276>] sock_destroy_inode+0x16/0x20
    [<c016149e>] dput+0x1e/0x170 i
    [<c014cb56>] __fput+0x116/0x140 i
    [<c014b38f>] filp_close+0xcf/0xe0 i
    [<c014b43e>] sys_close+0x9e/0xd0 i
    [<c01091c7>] syscall_call+0x7/0xb i

    Code: f3 a5 a8 02 74 02 66 a5 a8 01 74 01 a4 e8 84 fe ff ff 6a 00


    Suparna Bhattacharya (
    Linux Technology Center
    IBM Software Labs, India

    Suparna Bhattacharya (
    Linux Technology Center
    IBM Software Labs, India

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