Messages in this thread | | | Subject | Re: How kernel applies LRU to swap out physical pages? | From | Peter Zijlstra <> | Date | Tue, 11 Nov 2008 09:57:25 +0100 |
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On Tue, 2008-11-11 at 16:22 +0800, Pan ruochen wrote: > Hi All, > I'm reading the linux kernel 2.6.14. But can't understand how LRU algorithm > is applied to page swapping. what is the 'USED' of LRU referred to? The > reference counter which the page is mapped by processes, or the frequency that > CPU reads/writes in the page. In common sense, the LRU algorithm will be more > optimal for the second case. But it depends on CPU capability. > I will be very appreciated if somebody can explain that in details.
We don't actually use LRU but something like CLOCK.
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