Messages in this thread | | | Date | Mon, 25 Jan 1999 12:56:21 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: MM deadlock [was: Re: arca-vm-8...] |
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On Mon, 25 Jan 1999, Dr. Werner Fink wrote: > > This hypothetical bit should only be set if the page is read physical > from the swap device/file. That means it would take one step more > to swap out this page again (test_and_clear_bit of both > PG_recently_swapped_in and PG_referenced).
Ehh - it is already marked "accessed" in the page tables, which essentially amounts to exactly that kind of two-level aging (the PG_referenced bit only takes effect once the swapped-in page has once more been evicted from the page tables)
Linus
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