On Thu, May 26, 2011 at 8:05 PM, KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > On Fri, 27 May 2011 11:48:37 +0900 > KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > >> On Thu, 26 May 2011 18:49:26 -0700 >> Ying Han <yinghan@xxxxxxxxxx> wrote: > >> > Hmm.. I noticed a very strange behavior on a simple test w/ the patch set. >> > >> > Test: >> > I created a 4g memcg and start doing cat. Then the memcg being OOM >> > killed as soon as it reaches its hard_limit. We shouldn't hit OOM even >> > w/o async-reclaim. >> > >> > Again, I will read through the patch. But like to post the test result first. >> > >> > $ echo $$ >/dev/cgroup/memory/A/tasks >> > $ cat /dev/cgroup/memory/A/memory.limit_in_bytes >> > 4294967296 >> > >> > $ time cat /export/hdc3/dd_A/tf0 > /dev/zero >> > Killed >> > >> > real 0m53.565s >> > user 0m0.061s >> > sys 0m4.814s >> > >> >> Hmm, what I see is >> == >> root@bluextal kamezawa]# ls -l test/1G >> -rw-rw-r--. 1 kamezawa kamezawa 1053261824 May 13 13:58 test/1G >> [root@bluextal kamezawa]# mkdir /cgroup/memory/A >> [root@bluextal kamezawa]# echo 0 > /cgroup/memory/A/tasks >> [root@bluextal kamezawa]# echo 300M > /cgroup/memory/A/memory.limit_in_bytes >> [root@bluextal kamezawa]# echo 1 > /cgroup/memory/A/memory.async_control >> [root@bluextal kamezawa]# cat test/1G > /dev/null >> [root@bluextal kamezawa]# cat /cgroup/memory/A/memory.reclaim_stat >> recent_scan_success_ratio 83 >> limit_scan_pages 82 >> limit_freed_pages 49 >> limit_elapsed_ns 242507 >> soft_scan_pages 0 >> soft_freed_pages 0 >> soft_elapsed_ns 0 >> margin_scan_pages 218630 >> margin_freed_pages 181598 >> margin_elapsed_ns 117466604 >> [root@bluextal kamezawa]# >> == >> >> I'll turn off swapaccount and try again. >> > > A bug found....I added memory.async_control file to memsw.....file set by mistake. > Then, async_control cannot be enabled when swapaccount=0. I'll fix that. Yes, i have that changed in my previous testing > > So, how do you enabled async_control ? $ echo 1 >/dev/cgroup/memory/D/memory.async_control ? --Ying > > 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