linux/kernel/cgroup.c, branch v2.6.25

cgroups: include hierarchy ids in /proc//cgroup

2008-04-11T15:06:43Z

Extend the /proc//cgroup file to include the appropriate hierarchy ID on each line. Currently this ID isn't really needed since a hierarchy can be completely identified by the set of subsystems bound to it, but this is likely to change in the near future in order to support stateless subsystems and merging/rebinding of subsystems. Getting this change into 2.6.25 reduces the need for an API change later. Signed-off-by: Paul Menage Cc: Balbir Singh Cc: Pavel Emelyanov Cc: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroups: add cgroup support for enabling controllers at boot time

2008-04-04T21:46:26Z

The effects of cgroup_disable=foo are: - foo isn't auto-mounted if you mount all cgroups in a single hierarchy - foo isn't visible as an individually mountable subsystem As a result there will only ever be one call to foo->create(), at init time; all processes will stay in this group, and the group will never be mounted on a visible hierarchy. Any additional effects (e.g. not allocating metadata) are up to the foo subsystem. This doesn't handle early_init subsystems (their "disabled" bit isn't set be, but it could easily be extended to do so if any of the early_init systems wanted it - I think it would just involve some nastier parameter processing since it would occur before the command-line argument parser had been run. Hugh said: Ballpark figures, I'm trying to get this question out rather than processing the exact numbers: CONFIG_CGROUP_MEM_RES_CTLR adds 15% overhead to the affected paths, booting with cgroup_disable=memory cuts that back to 1% overhead (due to slightly bigger struct page). I'm no expert on distros, they may have no interest whatever in CONFIG_CGROUP_MEM_RES_CTLR=y; and the rest of us can easily build with or without it, or apply the cgroup_disable=memory patches. Unix bench's execl test result on x86_64 was == just after boot without mounting any cgroup fs.== mem_cgorup=off : Execl Throughput 43.0 3150.1 732.6 mem_cgroup=on : Execl Throughput 43.0 2932.6 682.0 == [lizf@cn.fujitsu.com: fix boot option parsing] Signed-off-by: Balbir Singh Cc: Paul Menage Cc: Balbir Singh Cc: Pavel Emelyanov Cc: KAMEZAWA Hiroyuki Cc: Hugh Dickins Cc: Sudhir Kumar Cc: YAMAMOTO Takashi Cc: David Rientjes Signed-off-by: Li Zefan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

NULL noise: fs/, mm/, kernel/*

2008-03-30T21:18:41Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

cgroup: fix default notify_on_release setting

2008-03-05T00:35:09Z

The documentation says the default value of notify_on_release of a child cgroup is inherited from its parent, which is reasonable, but the implementation just sets the flag disabled. Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroup: remove dead code in cgroup_get_rootdir()

2008-02-24T01:13:25Z

Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroup: remove duplicate code in find_css_set()

2008-02-24T01:13:25Z

The list head res->tasks gets initialized twice in find_css_set(). Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroup: fix subsys bitops

2008-02-24T01:13:24Z

Cgroup uses unsigned long for subsys bitops, not unsigned long long. Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroup: fix memory leak in cgroup_get_sb()

2008-02-24T01:13:24Z

opts.release_agent is not kfree()ed in all necessary places. Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cgroup: fix comments

2008-02-24T01:13:24Z

fix: - comments about need_forkexit_callback - comments about release agent - typo and comment style, etc. Signed-off-by: Li Zefan Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Handle pid namespaces in cgroups code

2008-02-07T16:42:22Z

There's one place that works with task pids - its the "tasks" file in cgroups. The read/write handlers assume, that the pid values go to/come from the user space and thus it is a virtual pid, i.e. the pid as it is seen from inside a namespace. Tune the code accordingly. Signed-off-by: Pavel Emelyanov Cc: "Eric W. Biederman" Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

linux/kernel/cgroup.c, branch v2.6.25

cgroups: include hierarchy ids in /proc//cgroup

cgroups: add cgroup support for enabling controllers at boot time

NULL noise: fs/*, mm/*, kernel/*

cgroup: fix default notify_on_release setting

cgroup: remove dead code in cgroup_get_rootdir()

cgroup: remove duplicate code in find_css_set()

cgroup: fix subsys bitops

cgroup: fix memory leak in cgroup_get_sb()

cgroup: fix comments

Handle pid namespaces in cgroups code

NULL noise: fs/, mm/, kernel/*