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    SubjectRe: [PATCH 12/14] vmscan: Do not writeback pages in direct reclaim
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    On Tue, Jul 6, 2010 at 3:02 PM, KOSAKI Motohiro
    <kosaki.motohiro@jp.fujitsu.com> wrote:
    >> On Tue, Jul 6, 2010 at 9:36 AM, KOSAKI Motohiro
    >> <kosaki.motohiro@jp.fujitsu.com> wrote:
    >> > Hello,
    >> >
    >> >> Ok, that's reasonable as I'm still working on that patch. For example, the
    >> >> patch disabled anonymous page writeback which is unnecessary as the stack
    >> >> usage for anon writeback is less than file writeback.
    >> >
    >> > How do we examine swap-on-file?
    >>
    >> bool is_swap_on_file(struct page *page)
    >> {
    >>     struct swap_info_struct *p;
    >>     swp_entry_entry entry;
    >>     entry.val = page_private(page);
    >>     p = swap_info_get(entry);
    >>     return !(p->flags & SWP_BLKDEV)
    >> }
    >
    > Well, do you suggested we traverse all pages in lru _before_
    > starting vmscan?
    >

    No. I don't suggest anything.
    What I say is just we can do it.
    If we have to implement it, Couldn't we do it in write_reclaim_page?



    --
    Kind regards,
    Minchan Kim
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