Hi, Here are my questions .... 1. How does the readahead work in page cache? (file->raend, ralen, ramax, rawin) 2. What kind of pages are in the lru_cache? (via lru_cache_add()) Thanks. Hao -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/