Hi,
It depends on how we handle COMPACTBLOCKS. I think COMPACTBLOCK mean "trial" of compaction so although we can't isolate any page at all, we have to accout it with "trial of compaction". And in your patch, although nr_migrate is zero, you account it, too. And we have been accounted it until now.
ok, Wait for Mel Gorman for the FINAL explanation. BR Huang Shijie -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>