Hi, I have a question when reading md driver. Following is the code from linux/drivers/md/md.c, function md_do_sync():
for_each_mddev(mddev2, tmp) { if (mddev2 == mddev) continue; if (!mddev->parallel_resync && mddev2->curr_resync && match_mddev_units(mddev, mddev2)) { DEFINE_WAIT(wq); if (mddev < mddev2 && mddev->curr_resync == 2) { /* arbitrarily yield */ mddev->curr_resync = 1; wake_up(&resync_wait); } if (mddev > mddev2 && mddev->curr_resync == 1) /* no need to wait here, we can wait the next * time 'round when curr_resync == 2 */ continue; /* We need to wait 'interruptible' so as not to
The type of mddev2 and mddev both are struct mddev *, so what's the meaning of comparing these two variables? -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs