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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 21:52:28 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-02 21:52:28 +0400
commit68d47a137c3bef754923bccf73fb639c9b0bbd5e (patch)
treee82a527bd978ee96283f03d0df36f47d9aee1e41 /net
parentc0e8a139a5bb8add02b4111e9e1957d810d7285e (diff)
parent8c7f6edbda01f1b1a2e60ad61f14fe38023e433b (diff)
downloadlinux-68d47a137c3bef754923bccf73fb639c9b0bbd5e.tar.xz
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 'net')
-rw-r--r--net/core/netprio_cgroup.c12
-rw-r--r--net/sched/cls_cgroup.c9
2 files changed, 20 insertions, 1 deletions
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index 6bc460c38e4f..39e7e4d3cdb4 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -328,7 +328,17 @@ struct cgroup_subsys net_prio_subsys = {
.attach = net_prio_attach,
.subsys_id = net_prio_subsys_id,
.base_cftypes = ss_files,
- .module = THIS_MODULE
+ .module = THIS_MODULE,
+
+ /*
+ * net_prio has artificial limit on the number of cgroups and
+ * disallows nesting making it impossible to co-mount it with other
+ * hierarchical subsystems. Remove the artificially low PRIOIDX_SZ
+ * limit and properly nest configuration such that children follow
+ * their parents' configurations by default and are allowed to
+ * override and remove the following.
+ */
+ .broken_hierarchy = true,
};
static int netprio_device_event(struct notifier_block *unused,
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 67cf90d962f4..4a23ccca6b70 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -80,6 +80,15 @@ struct cgroup_subsys net_cls_subsys = {
.subsys_id = net_cls_subsys_id,
.base_cftypes = ss_files,
.module = THIS_MODULE,
+
+ /*
+ * While net_cls cgroup has the rudimentary hierarchy support of
+ * inheriting the parent's classid on cgroup creation, it doesn't
+ * properly propagates config changes in ancestors to their
+ * descendents. A child should follow the parent's configuration
+ * but be allowed to override it. Fix it and remove the following.
+ */
+ .broken_hierarchy = true,
};
struct cls_cgroup_head {