Hi Rik,
I was trying to understand the page replacement code on kernel 2.6.10. I was looking at the code for kswapd and from what i gather, it seems like kswapd is woken up only in low memory situations... am i right?
Yes.
Doesn't this make the page replacement policy NRU and *not* LRU?
Is Mel Gorman's documentation up to date with the 2.6 kernel yet ?
No it is not. It is for the 2.4.20 kernel.
I have also read Rik's doc on Page replacement in the 2.4 kernel, which talks of page aging. These 2 seem to contradict... :(
2.4-rmap and 2.6 use different methods of page replacement.
Realized that rather painfully :-P
from here on, i'll talk abt the 2.6.10 kernel MM
1. ok... so, when a page is allocated, it is placed on the incative list right? So when does this page move to the active list? I know mark_page_accessed() does this, but when? I see calls to this function from a whole lot of Filesystem code and from zap_pte_range().
2. Alternatively, when does the page return to the inactive list? Only when kswapd is woken up?
3. what is the direct reclaim path?
4. what is the difference between shrink_cache() and shrink_caches(). note the 's'
c'ya rahul
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