Commit 2324c5dd authored by Li Zefan's avatar Li Zefan Committed by Linus Torvalds

memcgroup: fix and update documentation

- remove trailing " Bytes"s in the demonstration
- remove section 4.4 (feature control_type has been removed)
- fix reference section
Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: default avatarBalbir Singh <balbir@in.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bc231d2a
......@@ -170,14 +170,14 @@ NOTE: We can use a suffix (k, K, m, M, g or G) to indicate values in kilo,
mega or gigabytes.
# cat /cgroups/0/memory.limit_in_bytes
4194304 Bytes
4194304
NOTE: The interface has now changed to display the usage in bytes
instead of pages
We can check the usage:
# cat /cgroups/0/memory.usage_in_bytes
1216512 Bytes
1216512
A successful write to this file does not guarantee a successful set of
this limit to the value written into the file. This can be due to a
......@@ -187,7 +187,7 @@ this file after a write to guarantee the value committed by the kernel.
# echo -n 1 > memory.limit_in_bytes
# cat memory.limit_in_bytes
4096 Bytes
4096
The memory.failcnt field gives the number of times that the cgroup limit was
exceeded.
......@@ -233,13 +233,6 @@ cgroup might have some charge associated with it, even though all
tasks have migrated away from it. Such charges are automatically dropped at
rmdir() if there are no tasks.
4.4 Choosing what to account -- Page Cache (unmapped) vs RSS (mapped)?
The type of memory accounted by the cgroup can be limited to just
mapped pages by writing "1" to memory.control_type field
echo -n 1 > memory.control_type
5. TODO
1. Add support for accounting huge pages (as a separate controller)
......@@ -262,18 +255,19 @@ References
3. Emelianov, Pavel. Resource controllers based on process cgroups
http://lkml.org/lkml/2007/3/6/198
4. Emelianov, Pavel. RSS controller based on process cgroups (v2)
http://lkml.org/lkml/2007/4/9/74
http://lkml.org/lkml/2007/4/9/78
5. Emelianov, Pavel. RSS controller based on process cgroups (v3)
http://lkml.org/lkml/2007/5/30/244
6. Menage, Paul. Control Groups v10, http://lwn.net/Articles/236032/
7. Vaidyanathan, Srinivasan, Control Groups: Pagecache accounting and control
subsystem (v3), http://lwn.net/Articles/235534/
8. Singh, Balbir. RSS controller V2 test results (lmbench),
8. Singh, Balbir. RSS controller v2 test results (lmbench),
http://lkml.org/lkml/2007/5/17/232
9. Singh, Balbir. RSS controller V2 AIM9 results
9. Singh, Balbir. RSS controller v2 AIM9 results
http://lkml.org/lkml/2007/5/18/1
10. Singh, Balbir. Memory controller v6 results,
10. Singh, Balbir. Memory controller v6 test results,
http://lkml.org/lkml/2007/8/19/36
11. Singh, Balbir. Memory controller v6, http://lkml.org/lkml/2007/8/17/69
11. Singh, Balbir. Memory controller introduction (v6),
http://lkml.org/lkml/2007/8/17/69
12. Corbet, Jonathan, Controlling memory use in cgroups,
http://lwn.net/Articles/243795/
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