Eric Dumazet wrote: > A page fault is not that expensive. But clearing N*PAGE_SIZE bytes is, > because it potentially evicts a large part of CPU cache.
*A* page fault is not that expensive. The problem is that you get a page fault for every single page. For 200k allocated you get 50 page faults. It quickly adds up. -- ➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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