Hi ,
I am studing current page reaplcement policy that is LRU (actually LRU
like policy) .
In that , whenever there is first access to page , insert that
page into inactive list ( PG_lru =1 , PG_referenced =0 ) . For second
reference , keep the page in inactive list but mark it accessed . (PG_lru =1
and PG_referenced =0 ) . For third reference , move the page to active list
(PG_lru =1 , PG_active =1 and PG_referenced =0 ) .
OK.... but whenever there is page fault , control comes to
handle_mm_fault . It determine causes of page fault ans accordingly handle
it .
handle_mm_fault
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Handle_pte_fault
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do_anonymous_page do_wp_page do_swap_page
In any case (mentioned above ), if these function allocates new page frame
then that page frame is directly get added into active list (by calling
lru_cache_add_active ) .
I am here not unserstanding , why this algorithm directly add
new page to active list , eventhough that page has first access ?
Thanks
shyam
