Revert "xenserver: Renice netback process to priority 0 by default."

This reverts commit 641a0a4ed0a79d53a52d4e78ce1d90140a768798.

This is a crossport from master of commit b2cdfea by Ian Campbell, with
the following commit message:

Do not renice the netback thread.

We should increase the vswitchd daemon's priority instead.

2 files changed, 0 insertions, 35 deletions

diff --git a/xenserver/etc_init.d_vswitch b/xenserver/etc_init.d_vswitch
index ee858fda..5eaac71b 100755
--- a/xenserver/etc_init.d_vswitch
+++ b/xenserver/etc_init.d_vswitch
@@ -34,7 +34,6 @@ VSWITCHD_CONF="${VSWITCHD_CONF:-/etc/ovs-vswitchd.conf}"
 VSWITCHD_PIDFILE="${VSWITCHD_PIDFILE:-/var/run/ovs-vswitchd.pid}"
 VSWITCHD_RUN_DIR="${VSWITCHD_RUN_DIR:-/var/xen/vswitch}"
 VSWITCHD_PRIORITY="${VSWITCHD_PRIORITY:--5}"
-VSWITCHD_NETBACK_PRIORITY="${VSWITCHD_NETBACK_PRIORITY:-0}"
 VSWITCHD_LOGFILE="${VSWITCHD_LOGFILE:-/var/log/ovs-vswitchd.log}"
 VSWITCHD_FILE_LOGLEVEL="${VSWITCHD_FILE_LOGLEVEL:-}"
 VSWITCHD_SYSLOG_LOGLEVEL="${VSWITCHD_SYSLOG_LOGLEVEL:-WARN}"
@@ -116,28 +115,6 @@ 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=""
@@ -175,11 +152,6 @@ 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