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cgroup: Add .__DEBUG__. prefix to debug file names 

Clearly mark the debug files and hide them by default by prefixing
".__DEBUG__.".

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
This commit is contained in:
Tejun Heo 2018-11-13 12:06:41 -08:00
parent b1e3aeb11c
commit c1bbd933e5
1 changed files with 7 additions and 4 deletions
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11
kernel/cgroup/cgroup.c
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@ -1400,12 +1400,15 @@ static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,
struct cgroup_subsys *ss = cft->ss;
if (cft->ss && !(cft->flags & CFTYPE_NO_PREFIX) &&
!(cgrp->root->flags & CGRP_ROOT_NOPREFIX))
snprintf(buf, CGROUP_FILE_NAME_MAX, "%s.%s",
cgroup_on_dfl(cgrp) ? ss->name : ss->legacy_name,
!(cgrp->root->flags & CGRP_ROOT_NOPREFIX)) {
const char *dbg = (cft->flags & CFTYPE_DEBUG) ? ".__DEBUG__." : "";
snprintf(buf, CGROUP_FILE_NAME_MAX, "%s%s.%s",
dbg, cgroup_on_dfl(cgrp) ? ss->name : ss->legacy_name,
cft->name);
else
} else {
strscpy(buf, cft->name, CGROUP_FILE_NAME_MAX);
}
return buf;
}