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    SubjectRe: strange stuff in dmesg
    From
    On Thu, Dec 24, 2009 at 11:22 PM, BuraphaLinux Server
    <buraphalinuxserver@gmail.com> wrote:
    > On 12/24/09, Justin P. Mattock <justinmattock@gmail.com> wrote:
    >> On 12/24/09 02:03, BuraphaLinux Server wrote:
    >>> On my Dell OptiPlex 330 machines with kernel 2.6.32.2 I get a strange
    >>> WARNING.  Do I need to worry?  Here is the warning:
    >>>
    >>> [    0.000000] ------------[ cut here ]------------
    >>> [    0.000000] WARNING: at mm/page_alloc.c:1805
    >>> __alloc_pages_nodemask+0x1b6/0x730()
    >>> [    0.000000] Hardware name: OptiPlex 330
    >>> [    0.000000] Modules linked in:
    >>> [    0.000000] Pid: 0, comm: swapper Not tainted 2.6.32.2 #1
    >>> [    0.000000] Call Trace:
    >>> [    0.000000]  [<ffffffff8108e806>] ? __alloc_pages_nodemask+0x1b6/0x730
    >>> [    0.000000]  [<ffffffff81043f68>] warn_slowpath_common+0x78/0xd0
    >>> [    0.000000]  [<ffffffff81043fcf>] warn_slowpath_null+0xf/0x20
    >>> [    0.000000]  [<ffffffff8108e806>] __alloc_pages_nodemask+0x1b6/0x730
    >>> [    0.000000]  [<ffffffff810b4e28>] alloc_pages_current+0x78/0xf0
    >>> [    0.000000]  [<ffffffff8108da69>] __get_free_pages+0x9/0x50
    >>> [    0.000000]  [<ffffffff810bb912>] __kmalloc+0x112/0x120
    >>> [    0.000000]  [<ffffffff8146e773>] vgacon_scrollback_startup+0x13/0x70
    >>> [    0.000000]  [<ffffffff811d29b3>] vgacon_startup+0x2a3/0x420
    >>> [    0.000000]  [<ffffffff816fc556>] con_init+0x1b/0x230
    >>> [    0.000000]  [<ffffffff816fba00>] console_init+0x22/0x42
    >>> [    0.000000]  [<ffffffff816d4b8f>] start_kernel+0x240/0x3be
    >>> [    0.000000]  [<ffffffff816d4289>] x86_64_start_reservations+0x99/0xb9
    >>> [    0.000000]  [<ffffffff816d4389>] x86_64_start_kernel+0xe0/0xf2
    >>> [    0.000000] ---[ end trace 4eaa2a86a8e2da22 ]---
    >>>
    >>> I also got it on 2.6.31.9, but had waited to ask hoping 2.6.32.2 would fix
    >>> it.
    >>>
    >>> Attached is my config
    >>>
    >> was there a kernel that did not do this?
    >> if so can you try a bisect on this?
    >>
    >> Justin P. Mattock
    >>
    >
    > It took a while, but I have verified that 2.6.30.10 works without any
    > message, and 2.6.31 has the error message (but otherwise seems to run
    > ok).  The hex codes are different, but the function names match and
    > are in the same places.
    >
    > Does it have to be git bisect, or will trying the 2.6.31rc[1-9] be
    > enough instead?  The Documentation/BUG-HUNTING does not give detailed
    > enough instructions for me to do the bisect thing.

    Hey, the problem is that you configured VGACON_SOFT_SCROLLBACK_SIZE
    to be CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=65536, which will be
    65536Kb, i.e. 16384 pages, how huge! :)

    We shoud limit the number of VGACON_SOFT_SCROLLBACK_SIZE. I will cook
    a patch now...
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