> We could reclaim swap space for dirty pages. They have to be
> rewritten anyway...
>
> Or would the fragmentation risk be too high?
I guess the fragmentation would get worse. Also, when you've got
more than enough swap left there's absolutely no reason to reclaim
the swap when pages get dirtied.
I just guess we should start reclaiming swap space as soon as the
free swap space gets below, say, 5%. We could go for a more complex
system of only reclaiming the swap space of dirty pages from a lower
threshold on, but I doubt that's worth the complexity.
regards,
Rik
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