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    SubjectRe: [PATCH 3/3] [RFC] tmpfs: Add FALLOC_FL_MARK_VOLATILE/UNMARK_VOLATILE handlers
    On 06/10/2012 02:47 PM, Rik van Riel wrote:
    > On 06/08/2012 11:45 PM, John Stultz wrote:
    >> I *think* ideally, the pages in a volatile range should be similar to
    >> non-dirty file-backed pages. There is a cost to restore them, but
    >> freeing them is very cheap. The trick is that volatile ranges introduces
    > Easier to mark them dirty.
    >> a new relationship between pages. Since the neighboring virtual pages in
    >> a volatile range are in effect tied together, purging one effectively
    >> ruins the value of keeping the others, regardless of which zone they are
    >> physically.
    > Then the volatile ->writepage function can zap the whole
    > object.

    What about the concern that if we don't have swap, we'll not call
    writepage on tmpfs files?


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