【笔记】sys partition stat 含义

Read the fxxking source code
代码在 block/partition-generic.c

ssize_t part_stat_show(struct device *dev,
               struct device_attribute *attr, char *buf)
{
    struct hd_struct *p = dev_to_part(dev);
    int cpu;

    cpu = part_stat_lock();
    part_round_stats(cpu, p);
    part_stat_unlock();
    return sprintf(buf,
        "%8lu %8lu %8llu %8u "
        "%8lu %8lu %8llu %8u "
        "%8u %8u %8u"
        "\n",
        part_stat_read(p, ios[READ]),
        part_stat_read(p, merges[READ]),
        (unsigned long long)part_stat_read(p, sectors[READ]),
        jiffies_to_msecs(part_stat_read(p, ticks[READ])),
        part_stat_read(p, ios[WRITE]),
        part_stat_read(p, merges[WRITE]),
        (unsigned long long)part_stat_read(p, sectors[WRITE]),
        jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
        part_in_flight(p),
        jiffies_to_msecs(part_stat_read(p, io_ticks)),
        jiffies_to_msecs(part_stat_read(p, time_in_queue)));
}