Re: Fw: potential /dev/urandom scalability improvement

From: David Mosberger
Date: Fri Mar 26 2004 - 16:13:50 EST

>>>>> On Fri, 26 Mar 2004 12:33:03 -0800, Andrew Morton <akpm@xxxxxxxx> said:

Andrew> If someone does, say,

Andrew> prefetch_range(some_pointer, sizeof(*some_pointer));

Andrew> then it is possible that prefetch_range() could

Andrew> a) execute a prefetch at addresses which are not
Andrew> PREFETCH_STRIDE-aligned and, as a consequence,

Andrew> b) prefetch data from the next page, outside the range of
Andrew> the user's (addr,len).

This is getting silly. Cache-lines _never_ cross page-boundaries.

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