//定位哪些进程在用I/O资源
echo 1 > /proc/sys/vm/block_dump # 开启block_dump,此时会把io信息输入到dmesg中
watch -n 1 "dmesg -c | grep -oP \"\w+\(\d+\): (WRITE|READ)\" | sort | uniq -c"
echo 0 > /proc/sys/vm/block_dump # 不用时关闭
watch -n 1 "dmesg -c | grep -oP \"\w+\(\d+\): (WRITE|READ)\" | sort | uniq -c"
echo 0 > /proc/sys/vm/block_dump # 不用时关闭
