diff options
| author |   Shaohua Li <shli@fb.com> | 2017-07-12 11:49:55 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2017-07-29 09:00:03 -0600 |
| commit | 69fd5c391763bd94a40dd152bc72a7f230137150 (patch) | |
| tree | 9f44111556c0f8ac14410703a79c42289ea768c2 /include/linux/cgroup.h | |
| parent | block: always attach cgroup info into bio (diff) | |
| download | linux-dev-69fd5c391763bd94a40dd152bc72a7f230137150.tar.xz linux-dev-69fd5c391763bd94a40dd152bc72a7f230137150.zip | |
blktrace: add an option to allow displaying cgroup path
By default we output cgroup id in blktrace. This adds an option to
display cgroup path. Since get cgroup path is a relativly heavy
operation, we don't enable it by default.
with the option enabled, blktrace will output something like this:
dd-1353 [007] d..2 293.015252: 8,0 /test/level D R 24 + 8 [dd]
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/cgroup.h')
| -rw-r--r-- | include/linux/cgroup.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 52ef9a68ff14..6144fe923b73 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -613,6 +613,9 @@ static inline union kernfs_node_id *cgroup_get_kernfs_id(struct cgroup *cgrp) { return &cgrp->kn->id; } + +void cgroup_path_from_kernfs_id(const union kernfs_node_id *id, + char *buf, size_t buflen); #else /* !CONFIG_CGROUPS */ struct cgroup_subsys_state; @@ -645,6 +648,9 @@ static inline bool task_under_cgroup_hierarchy(struct task_struct *task, { return true; } + +static inline void cgroup_path_from_kernfs_id(const union kernfs_node_id *id, + char *buf, size_t buflen) {} #endif /* !CONFIG_CGROUPS */ /* |