From 988ca784d4840c87509e770a21d5d22105af8668 Mon Sep 17 00:00:00 2001
From: Mingli Yu <mingli.yu@windriver.com>
Date: Fri, 5 Nov 2021 11:18:07 +0800
Subject: [PATCH] bootchartd.in: make sure only one bootchartd process

When boot with "init=/sbin/bootchartd" as below:
 # runqemu qemux86 bootparams="init=/sbin/bootchartd"

There are two bootchartd process after boot [1].
 # ps -ef | grep bootchart
root       101     1  0 03:27 ?        00:00:00 /bin/sh /sbin/bootchartd
root       103   101  8 03:27 ?        00:00:02 /lib64/bootchart/bootchart-collector 50
root       106     1  0 03:27 ?        00:00:00 /bin/sh /sbin/bootchartd
root       792   106  0 03:27 ?        00:00:00 /lib64/bootchart/bootchart-collector --usleep 1000000
root       794   725  0 03:27 ttyS0    00:00:00 grep bootchart

 # /sbin/bootchartd stop
[bootchart] bootchart-collector started as pid 596 with 2 args:
[bootchart] '--dump'
[bootchart] '/tmp/bootchart.3lXpVDAq3v'
[bootchart] Extracting profile data from pid 204
[bootchart] map 0xbed9a000 -> 0xbedbb000 size: 132k from 'bed9a000' 'bedbb000'
[bootchart] read 135168 bytes of 135168
[bootchart] reading 150 chunks (of 150) ...
[bootchart] wrote 18760 kbB
[bootchart] bootchart-collector pid: 596 unmounted proc / clean exit

But there still one process exist after the above stop command finish.
 # ps -ef | grep bootchartd
root 202 1 0 09:09 ? 00:00:00 /bin/sh /sbin/bootchartd
root 629 516 0 09:10 ? 00:00:00 grep bootchartd

Remove the wait_boot which used to wait the boot process to finish to
make sure only one bootchartd process and meanwhile we don't need the
wait_boot logic because we either use "/sbin/bootchartd stop" to stop
the bootchartd manually or install package bootchartd-stop-initscript
altogether with bootchart2 to stop bootchartd automatically after boot.

After patch:
 # ps -ef | grep bootchart
 root       101     1  0 03:36 ?        00:00:00 /bin/sh /sbin/bootchartd
 root       103   101  6 03:36 ?        00:00:04 /lib64/bootchart/bootchart-collector 50
 root       596   592  0 03:37 ttyS0    00:00:00 grep bootchart

[1] https://github.com/xrmx/bootchart/issues/94

Upstream-Status: Submitted [https://github.com/xrmx/bootchart/pull/95]

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
---
 bootchartd.in | 1 -
 1 file changed, 1 deletion(-)

diff --git a/bootchartd.in b/bootchartd.in
index 7979ef9..f0e466d 100755
--- a/bootchartd.in
+++ b/bootchartd.in
@@ -183,7 +183,6 @@ if [ $$ -eq 1 ]; then
 	else # running inside the main system
 		echo "bootchart: no initrd used; starting"
 		start &
-		wait_boot &
 		# wait a little, until the collector is going, before allowing
 		# the rest of the system to charge ahead, so we catch it
 		$USLEEP 250000
-- 
2.17.1