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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-02 10:52:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-02 10:52:28 -0700 |
| commit | 68d47a137c3bef754923bccf73fb639c9b0bbd5e (patch) | |
| tree | e82a527bd978ee96283f03d0df36f47d9aee1e41 /include/linux/cgroup.h | |
| parent | c0e8a139a5bb8add02b4111e9e1957d810d7285e (diff) | |
| parent | 8c7f6edbda01f1b1a2e60ad61f14fe38023e433b (diff) | |
Merge branch 'for-3.7-hierarchy' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup hierarchy update from Tejun Heo:
"Currently, different cgroup subsystems handle nested cgroups
completely differently. There's no consistency among subsystems and
the behaviors often are outright broken.
People at least seem to agree that the broken hierarhcy behaviors need
to be weeded out if any progress is gonna be made on this front and
that the fallouts from deprecating the broken behaviors should be
acceptable especially given that the current behaviors don't make much
sense when nested.
This patch makes cgroup emit warning messages if cgroups for
subsystems with broken hierarchy behavior are nested to prepare for
fixing them in the future. This was put in a separate branch because
more related changes were expected (didn't make it this round) and the
memory cgroup wanted to pull in this and make changes on top."
* 'for-3.7-hierarchy' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index df354ae079c..f8a030ced0c 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -499,6 +499,21 @@ struct cgroup_subsys { */ bool __DEPRECATED_clear_css_refs; + /* + * If %false, this subsystem is properly hierarchical - + * configuration, resource accounting and restriction on a parent + * cgroup cover those of its children. If %true, hierarchy support + * is broken in some ways - some subsystems ignore hierarchy + * completely while others are only implemented half-way. + * + * It's now disallowed to create nested cgroups if the subsystem is + * broken and cgroup core will emit a warning message on such + * cases. Eventually, all subsystems will be made properly + * hierarchical and this will go away. + */ + bool broken_hierarchy; + bool warned_broken_hierarchy; + #define MAX_CGROUP_TYPE_NAMELEN 32 const char *name; |