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    SubjectRe: unable to handle kernel paging request at 40000000 __alloc_memory_core_early+0x147/0x1d6
    Hi,

    On Fri, 9 Jul 2010 15:08:52 -0400
    Yinghai Lu <yinghai@kernel.org> wrote:

    >On 07/09/2010 07:54 AM, Borislav Petkov wrote:
    >> Hi,
    >>
    >> this is something we're getting during testing on one of our boxes
    >> here, a dual socket Magny-Cours machine. It is oopsing on the addr
    >> variable in __alloc_memory_core_early() after converting it to a
    >> virtual address in order to clear the mem region at it. I've removed
    >> the "#if 0.. #endif" around the printk which dumps the ranges in the
    >> early node map for more info.
    >>
    >> It's latest -git, 32bit build, config is attached.
    >>
    >
    >can not duplicate on all my setup.
    >
    >but look at the code there is limit problem with 32 bit...
    >
    >please check if it will fix the problem.
    >
    >and we will need to rebase early_res to memblock patchset.
    >
    >Thanks
    >
    >Yinghai Lu
    >

    I'm sorry but the patch isn't working.

    Now we are seeing this:

    [ 0.000000] BUG: Int 6: CR2 (null)
    [ 0.000000] EDI 00000005 ESI f3e00800 EBP c21afed4 ESP c21afe90
    [ 0.000000] EBX 01000000 EDX 00000006 ECX (null) EAX fffffff4
    [ 0.000000] err (null) EIP c2359558 CS 00000060 flg 00010046
    [ 0.000000] Stack: fffffff4 (null) 00000001 f3e00000 00000005 00080000 00000001 00000002
    [ 0.000000] 000b6800 00000002 f3e00000 00000001 00000002 c21aff0c c2359dd2 (null)
    [ 0.000000] ffe00000 00000004 (null) 00000004 001fafd8 c2943000 (null) 00004e00
    [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.35-rc4+ #1
    [ 0.000000] Call Trace:
    [ 0.000000] [<c1dd39d9>] hlt_loop+0x0/0x3
    [ 0.000000] [<c2359558>] ? free_area_init_node+0x5b1/0x647
    [ 0.000000] [<c2359dd2>] free_area_init_nodes+0x7b5/0x89a
    [ 0.000000] [<c234a2c9>] paging_init+0x1a9/0x1cc
    [ 0.000000] [<c2330325>] setup_arch+0x1414/0x15f7
    [ 0.000000] [<c23510c1>] ? __reserve_early+0x119/0x135
    [ 0.000000] [<c1078c8a>] ? printk+0x36/0x54
    [ 0.000000] [<c232917b>] start_kernel+0x1d0/0xb6f
    [ 0.000000] [<c2328163>] i386_start_kernel+0x163/0x179


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