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SubjectRe: Memory Management - BSD vs Linux
On Aug 12,  7:19pm, "David S. Miller" wrote:
Subject: Re: Memory Management - BSD vs Linux
>Be careful. Unless you have a special L1 cache bypassing load
>instruction, you can end up thrashing the dcache horribly with such a
>scheme.

We were just talking about this and my guess was just the reverse.
The hash tables are designed to scatter so that series of
references to adjacent virtual page numbers should distribute over the
table. The multi-level scheme localizes ptes. So, first guess is that
bypassing hash table should make the dcache work better.
Why is that wrong?






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