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    SubjectRe: test13-pre5


    On Thu, 28 Dec 2000, Linus Torvalds wrote:

    > - make "SetPageDirty()" do something like
    >
    > if (!test_and_set(PG_dirty, &page->flags)) {
    > spin_lock(&page_cache_lock);
    > list_del(page->list);
    > list_add(page->list, page->mapping->dirty_pages);
    > spin_unlock(&page_cache_lock);
    > }
    >
    > This will require making sure that every place that does a
    > SetPageDirty() will be ok with this (ie double-check that they all have
    > a mapping: right now the free_pte() code in mm/memory.c doesn't care,
    > because it knew that it coul dmark even anonymous pages dirty and
    > they'd just get ignored.
    > - make a filemap_fdatasync() that walks the dirty pages and does a
    > writepage() on them all and moves them to the clean list.

    We also want to move the page to the per-address-space clean list in
    ClearPageDirty I suppose.

    -
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