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软件平台：Android11

硬件平台：QCS6125

需求：如题，串口需要输出logcat的系统全量日志，我这里边是把logcat日志定向到了/dev/kmsg从而使logcat跟kmsg一样通过串口输出。

改动如下：

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 3cf6ffc35..12337986a 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -399,8 +399,10 @@ on initchmod 0660 /sys/power/wake_lockchmod 0660 /sys/power/wake_unlock+    chmod 0660 /proc/kmsg# Start logd before any other services run to ensure we capture all of their logs.start logd
+    start logkevin# Start lmkd before any other services run so that it can register themchown root system /sys/module/lowmemorykiller/parameters/adjchmod 0664 /sys/module/lowmemorykiller/parameters/adj
@@ -423,6 +425,7 @@ on load_persist_props_actionload_persist_propsstart logdstart logd-reinit
+    start logkevin# Indicate to fw loaders that the relevant mounts are up.on firmware_mounts_complete
@@ -1058,6 +1061,11 @@ service ueventd /system/bin/ueventdseclabel u:r:ueventd:s0shutdown critical+service logkevin /system/bin/logcat -f /dev/kmsg *:D
+    class main
+    user root
+    group logd system
+service console /system/bin/shclass coreconsole

    重新编译刷机即可验证，注意如果串口日志仍不是全量则需要确认内核printk的级别，shell进设备，执行echo  7 > proc/sys/kernel/printk，可以将内核日志级别设置为最低，即基本上所有等级的日志都会输出到串口。

Mark～～～