Re: [PATCH] Rmap speedup

Rik van Riel
2002-08-05T13:54:46Z

On Mon, 5 Aug 2002, Daniel Phillips wrote:

> > Despite the fact that the number of pte_chain references in
> > page_add/remove_rmap now just averages two in that test.
>
> It's weird that it only averages two. It's a four way and your running
> 10 in parallel, plus a process to watch for completion, right?

I explained this one in the comment above the declaration of
struct pte_chain ;)

* A singly linked list should be fine for most, if not all, workloads.
* On fork-after-exec the mapping we'll be removing will still be near
* the start of the list, on mixed application systems the short-lived
* processes will have their mappings near the start of the list and
* in systems with long-lived applications the relative overhead of
* exit() will be lower since the applications are long-lived.

cheers,

Rik
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