Re: missing madvise functionality

[Ulrich Drepper]

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.

-- 
â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â

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