Messages in this thread | | | Date | Sat, 16 Jan 1999 18:35:29 +0100 (CET) | From | Andrea Arcangeli <> | Subject | Re: 2.2.0-pre[56] swap performance poor with > 1 thrashing task |
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On Fri, 8 Jan 1999, Linus Torvalds wrote:
> As a no-op, it can now randomly and unprectably result in even worthwhile > buffers just being thrown out - possibly quite soon after they've been > loaded in. I happen to believe that it doesn't actually matter (and I'm
I think it doesn't matter because the buffer_under_min() check just protect the buffer cache enough. In arca-vm-22 I removed the specific buffer and cache min limitis so I applyed Zlatko patch ;).
Basically arca-vm-22 take the sum of the buffermem+page_cache_size always close to a percentage tunable via sysctl (10% as default) when _low_ on memory. So the buffer aging now make sense to me (not benchmarked though ;).
Somebody in the list asked for an algorithm that doens't work with magic but it's tunable. Having a constant cache+buffermem memory size under swapping seems to work very well and even if it doesn't work with magic I like it right now.
Andrea Arcangeli
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