Re: [patch -mm 3/4] mm, memcg: replace memory.oom_group with policy tunable

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, 17 Jan 2018, David Rientjes wrote:

> Yes, this is a valid point.  The policy of "tree" and "all" are identical 
> policies and then the mechanism differs wrt to whether one process is 
> killed or all eligible processes are killed, respectively.  My motivation 
> for this was to avoid having two different tunables, especially because 
> later we'll need a way for userspace to influence the decisionmaking to 
> protect (bias against) important subtrees.  What would really be nice is 
> cgroup.subtree_control-type behavior where we could effect a policy and a 
> mechanism at the same time.  It's not clear how that would be handled to 
> allow only one policy and one mechanism, however, in a clean way.  The 
> simplest for the user would be a new file, to specify the mechanism and 
> leave memory.oom_policy alone.  Would another file really be warranted?  
> Not sure.
> 

Hearing no response, I'll implement this as a separate tunable in a v2 
series assuming there are no better ideas proposed before next week.  One 
of the nice things about a separate tunable is that an admin can control 
the overall policy and they can delegate the mechanism (killall vs one 
process) to a user subtree.  I agree with your earlier point that killall 
vs one process is a property of the workload and is better defined 
separately.

I'll also look to fix the breakage wrt root mem cgroup comparison with 
leaf mem cgroup comparison that is currently in -mm.
--
To unsubscribe from this list: send the line "unsubscribe cgroups" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]     [Monitors]

  Powered by Linux