slub: Support 4k kmallocs again to compensate for page allocator slowness
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Pekka Enberg
Reviewed-byQuoted 5 lines · Christoph Lameter
Currently we hand off
PAGE_SIZEdkmallocs to the page allocator in the mistaken belief that the page allocator can handle these allocations effectively. However, measurements indicate a mininum slowdown by the factor of 8 (and that is only SMP, NUMA is much worse) vs the slub fastpath which causes regressions in tbench.
Reviewed-by Pekka Enberg <[email protected]>
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