On Mon, 25 Apr 2011 18:25:29 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > 2) == hard limit 500M/ hi_watermark = 400M == > [root@rhel6-test hilow]# time cp ./tmpfile xxx > > real 0m6.421s > user 0m0.059s > sys 0m2.707s > When doing this, we see usage changes as (sec) (bytes) 0: 401408 <== cp start 1: 98603008 2: 262705152 3: 433491968 <== wmark reclaim triggerd. 4: 486502400 5: 507748352 6: 524189696 <== cp ends (and hit limits) 7: 501231616 8: 499511296 9: 477118464 10: 417980416 <== usage goes below watermark. 11: 417980416 ..... If we have dirty_ratio, this result will be some different. (and flusher thread will work sooner...) Thanks, -Kame -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>