1 files changed, 0 insertions, 140 deletions
diff --git a/net/ipv4/ipvs/ip_vs_sed.c b/net/ipv4/ipvs/ip_vs_sed.c
deleted file mode 100644
index 7d2f22f04b83..000000000000
--- a/net/ipv4/ipvs/ip_vs_sed.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * IPVS:        Shortest Expected Delay scheduling module
- *
- * Authors:     Wensong Zhang <wensong@linuxvirtualserver.org>
- *
- *              This program is free software; you can redistribute it and/or
- *              modify it under the terms of the GNU General Public License
- *              as published by the Free Software Foundation; either version
- *              2 of the License, or (at your option) any later version.
- *
- * Changes:
- *
- */
-
-/*
- * The SED algorithm attempts to minimize each job's expected delay until
- * completion. The expected delay that the job will experience is
- * (Ci + 1) / Ui if sent to the ith server, in which Ci is the number of
- * jobs on the ith server and Ui is the fixed service rate (weight) of
- * the ith server. The SED algorithm adopts a greedy policy that each does
- * what is in its own best interest, i.e. to join the queue which would
- * minimize its expected delay of completion.
- *
- * See the following paper for more information:
- * A. Weinrib and S. Shenker, Greed is not enough: Adaptive load sharing
- * in large heterogeneous systems. In Proceedings IEEE INFOCOM'88,
- * pages 986-994, 1988.
- *
- * Thanks must go to Marko Buuri <marko@buuri.name> for talking SED to me.
- *
- * The difference between SED and WLC is that SED includes the incoming
- * job in the cost function (the increment of 1). SED may outperform
- * WLC, while scheduling big jobs under larger heterogeneous systems
- * (the server weight varies a lot).
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-
-#include <net/ip_vs.h>
-
-
-static inline unsigned int
-ip_vs_sed_dest_overhead(struct ip_vs_dest *dest)
-{
-	/*
-	 * We only use the active connection number in the cost
-	 * calculation here.
-	 */
-	return atomic_read(&dest->activeconns) + 1;
-}
-
-
-/*
- *	Weighted Least Connection scheduling
- */
-static struct ip_vs_dest *
-ip_vs_sed_schedule(struct ip_vs_service *svc, const struct sk_buff *skb)
-{
-	struct ip_vs_dest *dest, *least;
-	unsigned int loh, doh;
-
-	IP_VS_DBG(6, "ip_vs_sed_schedule(): Scheduling...\n");
-
-	/*
-	 * We calculate the load of each dest server as follows:
-	 *	(server expected overhead) / dest->weight
-	 *
-	 * Remember -- no floats in kernel mode!!!
-	 * The comparison of h1*w2 > h2*w1 is equivalent to that of
-	 *		  h1/w1 > h2/w2
-	 * if every weight is larger than zero.
-	 *
-	 * The server with weight=0 is quiesced and will not receive any
-	 * new connections.
-	 */
-
-	list_for_each_entry(dest, &svc->destinations, n_list) {
-		if (!(dest->flags & IP_VS_DEST_F_OVERLOAD) &&
-		    atomic_read(&dest->weight) > 0) {
-			least = dest;
-			loh = ip_vs_sed_dest_overhead(least);
-			goto nextstage;
-		}
-	}
-	return NULL;
-
-	/*
-	 *    Find the destination with the least load.
-	 */
-  nextstage:
-	list_for_each_entry_continue(dest, &svc->destinations, n_list) {
-		if (dest->flags & IP_VS_DEST_F_OVERLOAD)
-			continue;
-		doh = ip_vs_sed_dest_overhead(dest);
-		if (loh * atomic_read(&dest->weight) >
-		    doh * atomic_read(&least->weight)) {
-			least = dest;
-			loh = doh;
-		}
-	}
-
-	IP_VS_DBG_BUF(6, "SED: server %s:%u "
-		      "activeconns %d refcnt %d weight %d overhead %d\n",
-		      IP_VS_DBG_ADDR(svc->af, &least->addr), ntohs(least->port),
-		      atomic_read(&least->activeconns),
-		      atomic_read(&least->refcnt),
-		      atomic_read(&least->weight), loh);
-
-	return least;
-}
-
-
-static struct ip_vs_scheduler ip_vs_sed_scheduler =
-{
-	.name =			"sed",
-	.refcnt =		ATOMIC_INIT(0),
-	.module =		THIS_MODULE,
-	.n_list =		LIST_HEAD_INIT(ip_vs_sed_scheduler.n_list),
-#ifdef CONFIG_IP_VS_IPV6
-	.supports_ipv6 =	1,
-#endif
-	.schedule =		ip_vs_sed_schedule,
-};
-
-
-static int __init ip_vs_sed_init(void)
-{
-	return register_ip_vs_scheduler(&ip_vs_sed_scheduler);
-}
-
-static void __exit ip_vs_sed_cleanup(void)
-{
-	unregister_ip_vs_scheduler(&ip_vs_sed_scheduler);
-}
-
-module_init(ip_vs_sed_init);
-module_exit(ip_vs_sed_cleanup);
-MODULE_LICENSE("GPL");