>> Why not also write pages out to swap before it's really necessary?
>> If they were left mapped but marked as having up-to-date copies
>> on swap, they could be discarded immediately if the system needed
>> memory. (Of course if they got written to they would have to be
>> paged out again.)
>
>Hmmm, interesting...
The gains from this might be largely illusion but you could get some
theoretical benefits:
o could write out lots of pages to swap without having to flush TLBs
like you would if doing normal swap, since page remains present
o if swsusp does not need to write already-backed pages it could
reduce suspend time
Maybe something like this?
if about_to_spin_down_disks || swap_disk_idle
if lots_of_memory_free
page_in
if little_memory_free
copy_pages_to_swap
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This archive was generated by hypermail 2b29 : Tue Apr 15 2003 - 22:00:26 EST