From b2cdfeae16fc4c7c7aedcc2b5e033abcaf52dc95 Mon Sep 17 00:00:00 2001
From: Ian Campbell <ian.campbell@citrix.com>
Date: Wed, 9 Sep 2009 18:08:58 +0100
Subject: [PATCH] Do not renice the netback thread.

We should increase the vswitchd daemon's priority instead.

Reverts 641a0a4ed
---
 xenserver/etc_init.d_vswitch                  | 28 -------------------
 .../root_vswitch_scripts_sysconfig.template   |  7 -----
 2 files changed, 35 deletions(-)

diff --git a/xenserver/etc_init.d_vswitch b/xenserver/etc_init.d_vswitch
index bb0011e3..ae0b6068 100755
--- a/xenserver/etc_init.d_vswitch
+++ b/xenserver/etc_init.d_vswitch
@@ -34,7 +34,6 @@ test -e /etc/sysconfig/vswitch && . /etc/sysconfig/vswitch
 : ${VSWITCHD_PIDFILE:=/var/run/ovs-vswitchd.pid}
 : ${VSWITCHD_RUN_DIR:=/var/xen/vswitch}
 : ${VSWITCHD_PRIORITY:=-5}
-: ${VSWITCHD_NETBACK_PRIORITY:=0}
 : ${VSWITCHD_LOGFILE:=/var/log/ovs-vswitchd.log}
 : ${VSWITCHD_FILE_LOGLEVEL:=}
 : ${VSWITCHD_SYSLOG_LOGLEVEL:=WARN}
@@ -113,28 +112,6 @@ function reload_vswitchd {
     fi
 }
 
-function quietly {
-    "$@" > /dev/null
-}
-
-# renice_netback PRIORITY PID [PID...]
-#
-# Renices the netback processes given as each PID to nice level PRIORITY.
-function renice_netback {
-    local pri=$1
-    shift
-
-    if test $# = 0; then
-        warning "Netback not running, nothing to renice"
-        return
-    fi
-
-    for pid
-    do
-        action "Renicing netback (pid $pid) to priority $pri" quietly renice $pri -p $pid
-    done
-}
-
 function start_vswitchd {
     local syslog_opt="-vANY:SYSLOG:${VSWITCHD_SYSLOG_LOGLEVEL}"
     local logfile_file_opt=""
@@ -172,11 +149,6 @@ function start_vswitchd {
     if [ "$ENABLE_FAKE_PROC_NET" = "y" ]; then
         fake_proc_net_opt="--fake-proc-net"
     fi
-    if [ "$VSWITCHD_NETBACK_PRIORITY" != default ]; then
-        renice_netback $VSWITCHD_NETBACK_PRIORITY $(pidof netback)
-    else
-        warning "Netback renicing disabled (see /etc/sysconfig/vswitch)"
-    fi
     if [ "$daemonize" != "y" ]; then
         # Start in background and force a "success" message
         action "Starting ovs-vswitchd ($strace_opt$valgrind_opt)" true
diff --git a/xenserver/root_vswitch_scripts_sysconfig.template b/xenserver/root_vswitch_scripts_sysconfig.template
index 4bc4b190..295392ee 100644
--- a/xenserver/root_vswitch_scripts_sysconfig.template
+++ b/xenserver/root_vswitch_scripts_sysconfig.template
@@ -43,13 +43,6 @@
 #     processes.
 # VSWITCHD_PRIORITY=-5
 
-# VSWITCHD_NETBACK_PRIORITY: "nice" priority at which to run netback.
-#     It is a good idea to run ovs-vswitchd at a higher priority than
-#     netback to ensure that it gets enough CPU time to set up flows
-#     (bug #1656).  Set this to 'default' to avoid changing netback's
-#     priority.
-# VSWITCHD_NETBACK_PRIORITY=0
-
 # VSWITCHD_LOGFILE: File to send the FILE_LOGLEVEL log messages to.
 # VSWITCHD_LOGFILE=/var/log/ovs-vswitchd.log
 
-- 
2.30.2