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    SubjectRe: [PATCH] __free_pages_ok oops
    On Thu, 7 Feb 2002, Hugh Dickins wrote:

    > > if (PageLRU(page)) {
    > > if (in_interrupt()) {
    > > add_page_to_special_list(page);
    > > return;
    > > } else
    > > lru_cache_del(page);
    > > }
    > If this were a common case where many pages end up, yes, we'd
    > need a separate special list; but it's a very rare case

    Think of a web or ftp server doing nothing but sendfile()

    > I was proposing we revert to distinguishing page_cache_release
    > from put_page, page_cache_release doing the lru_cache_del; and
    > I'd like to add my in_interrupt() BUG() there for now, just as
    > a sanity check. You are proposing that we keep the current,
    > post-Ben, structure of doing it in __free_pages_ok if possible.

    So how exactly would pages be freed ?

    You still need to do the check of whether the page can
    be freed somewhere.


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