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    SubjectRe: [PATCH] __free_pages_ok oops
    On Thu, 7 Feb 2002, Rik van Riel wrote:
    > The mechanism to do what I described above should of course be
    > in __free_pages_ok().
    > 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, so I
    think it's more appropriate to let shrink_cache do it when it
    eventually reaches them on the inactive_list.

    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.

    I think I prefer mine, in_interrupt() as a sanity check which
    could be removed when we feel safer, to yours where it's
    deciding the behaviour of __free_pages_ok. Any strong feelings?


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