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    SubjectRe: [PATCH 3/3] mm: slub: Default slub_max_order to 0
    On Wed, May 11, 2011 at 01:38:47PM -0700, David Rientjes wrote:
    > kswapd and doing compaction for the higher order allocs before falling

    Note that patch 2 disabled compaction by clearing __GFP_WAIT.

    What you describe here would be patch 2 without the ~__GFP_WAIT
    addition (so keeping only ~GFP_NOFAIL).

    Not clearing __GFP_WAIT when compaction is enabled is possible and
    shouldn't result in bad behavior (if compaction is not enabled with
    current SLUB it's hard to imagine how it could perform decently if
    there's fragmentation). You should try to benchmark to see if it's
    worth it on the large NUMA systems with heavy network traffic (for
    normal systems I doubt compaction is worth it but I'm not against
    trying to keep it enabled just in case).

    On a side note, this reminds me to rebuild with slub_max_order in .bss
    on my cellphone (where I can't switch to SLAB because of some silly
    rfs vfat-on-steroids proprietary module).

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      Last update: 2011-05-12 19:39    [W:0.018 / U:7.180 seconds]
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