Hello, Rafael. I looked at some compaction code and found that some oddity about balloon compaction. In isolate_migratepages_range(), if we meet !PageLRU(), we check whether this page is for balloon compaction. In this case, code needs locked. Is the lock really needed? I can't find any relationship between balloon compaction and LRU lock.
Second question is that in above case if we don't hold a lock, we skip this page. I guess that if we meet balloon page repeatedly, there is no change to run isolation. Am I missing? Please let me know what I am missing. Thanks in advance. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
