Hi Rami, Thanks a lot for your sequence. I followed it and it does work. I now see my process paused in sleep state instead of getting killed when the cgroup reaches OoO.
This being said: * I do not really understand why the use_hierarchy option needs to be disabled in order to allow disabling of the oom killer... * I'm not sure that disabling the OoO killer is safe/reliable enough: in some of the trials I made, I saw other processes (xterms) not part of the OoO cgroup getting completely stuck and I had to reboot my machine... Best Regards, Hedi From: Rami Rosen <[email protected]> To: Hedi Boufaied <[email protected]>, Cc: kernelnewbies <[email protected]> Date: 15/04/2014 15:39 Subject: Re: cgroups: cannot write on file memory.oom_control Hi, Hedi, This sequence works for me: echo 0 > /sys/fs/cgroup/memory/memory.use_hierarchy mkdir /sys/fs/cgroup/memory/0 Then, the following two commands changes the value of oom_kill_disable: echo 1 > /sys/fs/cgroup/memory/0/memory.oom_control echo 0 > /sys/fs/cgroup/memory/0/memory.oom_control For more info, please look for the text about enabling/disabling use_hierarchy in section 6, http://lxr.free-electrons.com/source/Documentation/cgroups/memory.txt. Regards, Rami Rosen http://ramirose.wix.com/ramirosen On Mon, Apr 14, 2014 at 12:22 PM, Hedi Boufaied <[email protected]> wrote: > Hi everyone, > > I am working with cgroups on OpenSuse (over VirtualBox) and I cannot disable > the OOM killer by writing to the file memory.oom_control: > >> echo 1 > memory.oom_control >> -bash: echo: write error: Invalid argument > > I can change the memory limit and several other settings by writing to the > appropriate files (like memory.limit_in_bytes) but I could never write to > file memory.oom_control although I am root. > > I saw someone posted a similar issue a few days ago but there was no > reply... > > I have copied below the sequence of command I am using. Any idea what could > be the issue ? > > Thanks in advance for your help! > > Hedi > > > ---- > > /sys/fs> su - root > > /sys/fs> cd cgroup > > /sys/fs/cgroup> cgcreate -g memory:/mygroup > > /sys/fs/cgroup> cd memory/mygroup > > /sys/fs/cgroup/memory/mygroup> echo 32M > memory.limit_in_bytes > > /sys/fs/cgroup/memory/mygroup> cat memory.limit_in_bytes > 33554432 > > /sys/fs/cgroup/memory/mygroup> echo 1 > memory.oom_control > -bash: echo: write error: Invalid argument > > /sys/fs/cgroup/memory/mygroup> cat memory.oom_control > oom_kill_disable 0 > under_oom 0 > > --- > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies >
_______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
