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    SubjectRe: [Bug #13319] Page allocation failures with b43 and p54usb
    On Sun, 07 Jun 2009 11:35:27 -0500
    Larry Finger <Larry.Finger@lwfinger.net> wrote:

    > Pekka Enberg wrote:
    > > On Sun, Jun 7, 2009 at 5:19 PM, Rik van Riel <riel@redhat.com> wrote:
    > >> That is a very strange trace. The Mem-Info indicates
    > >> that the system has more than enough memory free, and
    > >> also enough memory in higher-order free blocks.
    > >>
    > >> This would indicate a bug somewhere in the page
    > >> allocator - this memory should have been given to this
    > >> allocation request.
    > >
    > > Aha, I always have difficulties deciphering the traces. But lets
    > > invite Mel to the party then!
    >
    > I'm happy to see some action on this problem. As usual, I'm happy to
    > test patches and/or provide diagnostic output.
    >
    One question.

    Did your system fragmented in same way as to this
    (see DMA32, 10052 of order-0 pages) in older kernel ? I think you can check
    fragmentation status via /proc/buddyinfo.
    =
    kernel: Node 0 DMA: 3*4kB 3*8kB 5*16kB 2*32kB 4*64kB 1*128kB 2*256kB 0*512kB
    1*1024kB 0*2048kB 0*4096kB = 2100kB
    kernel: Node 0 DMA32: 10062*4kB 1*8kB 1*16kB 0*32kB 1*64kB 1*128kB 0*256kB
    1*512kB 0*1024kB 0*2048kB 0*4096kB = 40976kB
    ==

    Thanks,
    -Kame




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