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SubjectSwap reclaiming

Browsing through 2.4.8 patch, I found this:

+ * When swap space gets filled up, we will set this flag.
+ * This will make do_swap_page(), in the page fault path,
+ * free swap entries on swapin so we'll reclaim swap space
+ * in order to be able to swap something out.
+ *
+ * At the moment we start reclaiming when swap usage goes
+ * over 80% of swap space.
+ *
+ * XXX: Random numbers, fixme.
+ */
+#define SWAP_FULL_PCT 80
+int vm_swap_full (void)
+ int swap_used = total_swap_pages - nr_swap_pages;
+ return swap_used * 100 > total_swap_pages * SWAP_FULL_PCT;

Hmm... This kind-of defeats purposes on swap priorities: with this,
you are going to fill slow swap even through there is lots of fast
swap that could be reclaimed.

I'm not sure what fix should be.
I'm "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at
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