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    Subject[PATCH -mm 09/24] vmscan: add newly swapped in pages to the inactive list
    From: Rik van Riel <riel@redhat.com>

    Swapin_readahead can read in a lot of data that the processes in
    memory never need. Adding swap cache pages to the inactive list
    prevents them from putting too much pressure on the working set.

    This has the potential to help the programs that are already in
    memory, but it could also be a disadvantage to processes that
    are trying to get swapped in.

    Signed-off-by: Rik van Riel <riel@redhat.com>

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

    Index: linux-2.6.26-rc5-mm2/mm/swap_state.c
    ===================================================================
    --- linux-2.6.26-rc5-mm2.orig/mm/swap_state.c 2008-06-10 13:35:23.000000000 -0400
    +++ linux-2.6.26-rc5-mm2/mm/swap_state.c 2008-06-10 13:40:46.000000000 -0400
    @@ -303,7 +303,7 @@ struct page *read_swap_cache_async(swp_e
    /*
    * Initiate read into locked page and return.
    */
    - lru_cache_add_active_anon(new_page);
    + lru_cache_add_anon(new_page);
    swap_readpage(NULL, new_page);
    return new_page;
    }
    --
    All Rights Reversed



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