lkml.org 
[lkml]   [2008]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectRe: [patch 05/19] split LRU lists into anon & file sets
    Hi Rik

    > @@ -1128,64 +1026,65 @@ static void shrink_active_list(unsigned
    (snip)

    > + /*
    > + * For sorting active vs inactive pages, we'll use the 'anon'
    > + * elements of the local list[] array and sort out the file vs
    > + * anon pages below.
    > + */
    > while (!list_empty(&l_hold)) {
    > + lru = LRU_INACTIVE_ANON;
    > cond_resched();
    > page = lru_to_page(&l_hold);
    > list_del(&page->lru);
    > - if (page_mapped(page)) {
    > - if (!reclaim_mapped ||
    > - (total_swap_pages == 0 && PageAnon(page)) ||
    > - page_referenced(page, 0, sc->mem_cgroup)) {
    > - list_add(&page->lru, &list[LRU_ACTIVE]);
    > - continue;
    > - }
    > - } else if (TestClearPageReferenced(page)) {
    > - list_add(&page->lru, &list[LRU_ACTIVE]);
    > - continue;
    > - }
    > - list_add(&page->lru, &list[LRU_INACTIVE]);
    > + if (page_referenced(page, 0, sc->mem_cgroup))
    > + lru = LRU_ACTIVE_ANON;
    > + list_add(&page->lru, &list[lru]);
    > }

    Why drop (total_swap_pages == 0 && PageAnon(page)) condition?
    in embedded sysmtem,
    CONFIG_NORECLAIM is OFF (because almost embedded cpu is 32bit) and
    that anon move to inactive list is meaningless because it doesn't have swap.

    below code is more good, may be.
    but I don't understand yet why ignore page_referenced() result at anon page ;-)


    - kosaki


    ---
    mm/vmscan.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    Index: linux-2.6.24-rc6-mm1-rvr/mm/vmscan.c
    ===================================================================
    --- linux-2.6.24-rc6-mm1-rvr.orig/mm/vmscan.c 2008-01-11 13:59:12.000000000 +0900
    +++ linux-2.6.24-rc6-mm1-rvr/mm/vmscan.c 2008-01-11 16:16:44.000000000 +0900
    @@ -1147,7 +1147,7 @@ static void shrink_active_list(unsigned
    }

    if (page_referenced(page, 0, sc->mem_cgroup)) {
    - if (file)
    + if (file || (total_swap_pages == 0))
    /* Referenced file pages stay active. */
    lru = LRU_ACTIVE_ANON;
    else



    \
     
     \ /
      Last update: 2008-01-11 08:39    [W:3.675 / U:0.200 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site