diff options
Diffstat (limited to 'Documentation/cgroups/cgroups.txt')
| -rw-r--r-- | Documentation/cgroups/cgroups.txt | 27 |
1 files changed, 7 insertions, 20 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index 8e74980ab385..4a0b64c605fc 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -370,15 +370,12 @@ To mount a cgroup hierarchy with just the cpuset and memory subsystems, type: # mount -t cgroup -o cpuset,memory hier1 /sys/fs/cgroup/rg1 -To change the set of subsystems bound to a mounted hierarchy, just -remount with different options: -# mount -o remount,cpuset,blkio hier1 /sys/fs/cgroup/rg1 - -Now memory is removed from the hierarchy and blkio is added. - -Note this will add blkio to the hierarchy but won't remove memory or -cpuset, because the new options are appended to the old ones: -# mount -o remount,blkio /sys/fs/cgroup/rg1 +While remounting cgroups is currently supported, it is not recommend +to use it. Remounting allows changing bound subsystems and +release_agent. Rebinding is hardly useful as it only works when the +hierarchy is empty and release_agent itself should be replaced with +conventional fsnotify. The support for remounting will be removed in +the future. To Specify a hierarchy's release_agent: # mount -t cgroup -o cpuset,release_agent="/sbin/cpuset_release_agent" \ @@ -637,16 +634,6 @@ void exit(struct task_struct *task) Called during task exit. -int populate(struct cgroup *cgrp) -(cgroup_mutex held by caller) - -Called after creation of a cgroup to allow a subsystem to populate -the cgroup directory with file entries. The subsystem should make -calls to cgroup_add_file() with objects of type cftype (see -include/linux/cgroup.h for details). Note that although this -method can return an error code, the error code is currently not -always handled well. - void post_clone(struct cgroup *cgrp) (cgroup_mutex held by caller) @@ -656,7 +643,7 @@ example in cpusets, no task may attach before 'cpus' and 'mems' are set up. void bind(struct cgroup *root) -(cgroup_mutex and ss->hierarchy_mutex held by caller) +(cgroup_mutex held by caller) Called when a cgroup subsystem is rebound to a different hierarchy and root cgroup. Currently this will only involve movement between |