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    SubjectVanilla-Kernel 3 - page allocation failure
    After updating kernel (x86_64) to stable version 3 there are a few 
    messages appearing in the kernel log such as

    kworker/0:1: page allocation failure: order:1, mode:0x20
    mysql: page allocation failure: order:1, mode:0x20
    php5: page allocation failure: order:1, mode:0x20

    Searching the net showed that these messages are known to occur since 2004.

    Some people were able to get rid of them by setting
    /proc/sys/vm/min_free_kbytes to a high enough value. This does not help
    in our case.

    Is there a kernel comand line argument to avoid these messages?

    As of mm/page_alloc.c these messages are marked to be only warning
    messages and would not appear if 'gpf_mask' was set to __GFP_NOWARN in
    function warn_alloc_failed.

    How does this mask get set? Is it set by the "external" process knocking
    at the memory manager?

    What is the magic behind the 'order' and 'mode'?

    I'm not a subscriber, so please CC me a copy of messages related to the
    subject. I'm not sure if I can help much by looking at the inside of the
    kernel, but I will try my best to answer any questions concerning this

    Best regards, Philipp

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      Last update: 2011-10-18 12:33    [W:0.018 / U:2.232 seconds]
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