lkml.org 
[lkml]   [2011]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Android low memory killer vs. memory pressure notifications
On Tue, 20 Dec 2011, Anton Vorontsov wrote:

> Hm, assuming that metadata is no longer an issue, why do you think avoiding
> cgroups would be a good idea?
>

It's helpful for certain end users, particularly those in the embedded
world, to be able to disable as many config options as possible to reduce
the size of kernel image as much as possible, so they'll want a minimal
amount of kernel functionality that allows such notifications. Keep in
mind that CONFIG_CGROUP_MEM_RES_CTLR is not enabled by default because of
this (enabling it, CONFIG_RESOURCE_COUNTERS, and CONFIG_CGROUPS increases
the size of the kernel text by ~1%), and it's becoming increasingly
important for certain workloads to be notified of low memory conditions
without any restriction on its usage other than the amount of RAM that the
system has so that they can trigger internal memory freeing, explicit
memory compaction from the command line, drop caches, reducing scheduling
priority, etc.


\
 
 \ /
  Last update: 2011-12-20 22:39    [W:2.109 / U:0.892 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site