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based by vmalloc()'ed memory. I now alloc a slab which is roughly 32*spl_obj_size and in this block of memory I place the slab descriptor, slab object descriptors, and objects themselves. This greatly reduces vmalloc lock contention. Still some minor cleanup remains and fine tuning but it's working pretty well. git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@139 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c