From: Ed Tomlinson <tomlins@cam.org>
To: linux-kernel@vger.kernel.org
Subject: [RFC][PATCH] vm_swap_full
Date: Sun, 4 Nov 2001 10:23:41 -0500 [thread overview]
Message-ID: <20011104152341.A4C289E898@oscar.casa.dyndns.org> (raw)
Hi,
I my opinion, basing the vm_swap_full test on the size of swap is bogus.
If you have a 512M box with 128M of swap its a good idea to always release
aggressively. If the same box has 2G of swap (has /tmp on tmpfs maybe), it
does not make sense to start the agressive release at 1G. I suggest the
following makes more sense.
--- linux/include/linux/swap.h.orig Sun Nov 4 09:30:14 2001
+++ linux/include/linux/swap.h Sun Nov 4 09:32:46 2001
@@ -80,8 +80,8 @@
extern int nr_swap_pages;
-/* Swap 50% full? Release swapcache more aggressively.. */
-#define vm_swap_full() (nr_swap_pages*2 < total_swap_pages)
+/* Free swap less than inactive pages? Release swapcache more aggressively.. */
+#define vm_swap_full() (nr_swap_pages < nr_inactive_pages)
extern unsigned int nr_free_pages(void);
extern unsigned int nr_free_buffer_pages(void);
This starts aggressive swaping when the ammount of space left in swap is
less than the size of the inactive pages.
Comments?
Ed Tomlinson
next reply other threads:[~2001-11-04 15:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-04 15:23 Ed Tomlinson [this message]
2001-11-04 16:36 ` [RFC][PATCH] vm_swap_full Rik van Riel
2001-11-04 17:04 ` Ed Tomlinson
2001-11-05 2:08 ` Mike Fedyk
2001-11-05 2:58 ` Ed Tomlinson
2001-11-05 3:10 ` Mike Fedyk
2001-11-05 3:15 ` Rik van Riel
2001-11-05 12:37 Ed Tomlinson
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