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| author | Waiman Long <longman@redhat.com> | 2018-11-08 18:08:46 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-11-08 23:27:32 +0300 |
| commit | 5cf8114d6e90b3822be5eb6a2faedf99d1c08f77 (patch) | |
| tree | 16b09eef25c0af64f99e434122240bd5e652fde3 /kernel/cgroup/cgroup-internal.h | |
| parent | 90e92f2d557ee3b0883a3bee76150b9026dba192 (diff) | |
| download | linux-5cf8114d6e90b3822be5eb6a2faedf99d1c08f77.tar.xz | |
cpuset: Expose cpuset.cpus.subpartitions with cgroup_debug
For debugging purpose, it will be useful to expose the content of the
subparts_cpus as a read-only file to see if the code work correctly.
However, subparts_cpus will not be used at all in most use cases. So
adding a new cpuset file that clutters the cgroup directory may not be
desirable. This is now being done by using the hidden "cgroup_debug"
kernel command line option to expose a new "cpuset.cpus.subpartitions"
file.
That option was originally used by the debug controller to expose
itself when configured into the kernel. This is now extended to set an
internal flag used by cgroup_addrm_files(). A new CFTYPE_DEBUG flag
can now be used to specify that a cgroup file should only be created
when the "cgroup_debug" option is specified.
Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cgroup-internal.h')
| -rw-r--r-- | kernel/cgroup/cgroup-internal.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index 75568fcf2180..c950864016e2 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -11,6 +11,8 @@ #define TRACE_CGROUP_PATH_LEN 1024 extern spinlock_t trace_cgroup_path_lock; extern char trace_cgroup_path[TRACE_CGROUP_PATH_LEN]; +extern bool cgroup_debug; +extern void __init enable_debug_cgroup(void); /* * cgroup_path() takes a spin lock. It is good practice not to take |