> If the system 512MB memory, DEF_PRIORITY mean 128kB scan and It takes 4096 > shrink_page_list() calls to scan 128kB (i.e. 128kB/32=4096) memory. Err you must forgot the page size. 128kB means 128kB/4kB=32 pages which fit exactly into one SWAP_CLUSTER_MAX batch. The shrink_page_list() call times has nothing to do DEF_PRIORITY. Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>