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    SubjectRe: [PATCH 0/5] Reduce GFP_ATOMIC allocation failures, candidate fix V3
    On Thu, Nov 12, 2009 at 07:30:30PM +0000, Mel Gorman wrote:

    > [Bug #14265] ifconfig: page allocation failure. order:5, mode:0x8020 w/ e100

    > Patches 1-3 should be tested first. The testing I've done shows that the
    > page allocator and behaviour of congestion_wait() is more in line with
    > 2.6.30 than the vanilla kernels.
    > It'd be nice to have 2 more tests, applying each patch on top noting any
    > behaviour change. i.e. ideally there would be results for
    > o patches 1+2+3
    > o patches 1+2+3+4
    > o patches 1+2+3+4+5
    > Of course, any tests results are welcome. The rest of the mail is the
    > results of my own tests.

    I've tried testing 3+4+5 against 2.6.32-rc7 (1+2 seem to be in
    mainline) and got failure. I've noticed something strange (I think).
    I was unable to trigger failures when system was under heavy memory
    pressure (i.e. my testing - gitk, firefoxes, etc.). When I killed
    almost all memory hogs, put system into sleep and resumed -- it
    failed. free(1) showed:

    total used free shared buffers cached
    Mem: 255240 194052 61188 0 4040 49364
    -/+ buffers/cache: 140648 114592
    Swap: 514040 72712 441328

    Is that ok? Wild guess -- maybe kswapd doesn't take fragmentation (or
    other factors) into account as hard as it used to in 2.6.30?


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