Hello,

On Thu, Nov 26, 2015 at 11:25:11PM -0600, Serge E. Hallyn wrote:

quoted

quoted

+	/* Short-circuit the easy case - kn_to is the root node. */
+	if ((kn_from == kn_to) || (!kn_from && !kn_to->parent)) {
+		*p = '/';
+		*(p + 1) = '\0';

Hmm... so if kn_from == kn_to, the output is "/"?

Yes, that's what seems to make the most sense for cgroup namespaces.  I
could see a case for '.' being used instead in general, but for cgroup
namespaces I think we'd have to convert those back to '/'.  Otherwise
we'll fail in being able to run legacy software, which would get
confused.

Yeah, I agree but the name is kinda misleading tho.  The output isn't
really a relative path but rather absolute path against the specified
root.  Maybe updating the function and parameter names would be
helpful?

Thanks.

-- 
tejun
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