Package: linux-2.6
Severity: wishlist
Tags: patch
This patch simply adds a new sysctl variable that enables better tuning
of the lblc scheduler expiration algorithm. More details are available
at
http://kb.linuxvirtualserver.org/wiki/Talk:Locality-Based_Least-Connection_Scheduling
Thanks,
Janusz
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (600, 'testing'), (300, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.17-2-vserver-686
Locale: LANG=pl_PL, LC_CTYPE=pl_PL (charmap=ISO-8859-2)
--- linux-source-2.6.15/include/net/ip_vs.h 2006-01-03 04:21:10.000000000 +0100
+++ linux-source-2.6.15-1-e50-debug_7bpo1.200604270947/include/net/ip_vs.h 2006-09-19 15:29:01.000000000 +0200
@@ -359,6 +359,7 @@ enum {
NET_IPV4_VS_SYNC_THRESHOLD=24,
NET_IPV4_VS_NAT_ICMP_SEND=25,
NET_IPV4_VS_EXPIRE_QUIESCENT_TEMPLATE=26,
+ NET_IPV4_VS_LBLC_TIMEOUT=27,
NET_IPV4_VS_LAST
};
--- linux-source-2.6.15/net/ipv4/ipvs/ip_vs_lblc.c 2006-01-03 04:21:10.000000000 +0100
+++ linux-source-2.6.15-1-e50-debug_7bpo1.200604270947/net/ipv4/ipvs/ip_vs_lblc.c 2006-09-19 16:37:29.000000000 +0200
@@ -57,6 +57,7 @@
*/
#define CHECK_EXPIRE_INTERVAL (60*HZ)
#define ENTRY_TIMEOUT (6*60*HZ)
+static int sysctl_ip_vs_lblc_timeout = ENTRY_TIMEOUT;
/*
* It is for full expiration check.
@@ -118,6 +119,14 @@ static ctl_table vs_vars_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
},
+ {
+ .ctl_name = NET_IPV4_VS_LBLC_TIMEOUT,
+ .procname = "lblc_timeout",
+ .data = &sysctl_ip_vs_lblc_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ },
{ .ctl_name = 0 }
};
@@ -367,7 +376,7 @@ static void ip_vs_lblc_check_expire(unsi
write_lock(&tbl->lock);
list_for_each_entry_safe(en, nxt, &tbl->bucket[j], list) {
- if (time_before(now, en->lastuse + ENTRY_TIMEOUT))
+ if (time_before(now, en->lastuse + sysctl_ip_vs_lblc_timeout))
continue;
ip_vs_lblc_free(en);
