On 06/21/2018 03:58 PM, Waiman Long wrote:

On 06/20/2018 10:27 PM, Peter Zijlstra wrote:

quoted

On Mon, Jun 18, 2018 at 12:14:01PM +0800, Waiman Long wrote:

quoted

+  cpuset.sched.domain_root

Why are we calling this a domain_root and not a partition?

A partition can consist of several cgroups in a tree structure. That
flag should only be set at the root of a partition. I will change the
name to partition_root if you think this name is acceptable.

quoted

quoted

+	A read-write single value file which exists on non-root
+	cpuset-enabled cgroups.  It is a binary value flag that accepts
+	either "0" (off) or "1" (on).  This flag is set by the parent
+	and is not delegatable.

You still haven't answered:
,  
  https://lkml.kernel.org/r/20180531094943.GG12180@hirez.programming.kicks-ass.net

the question stands.

I am sorry to miss your question. Turning on domain_root will affects
the cpu mapping in the parent. That is why it cannot be set by the child
as a child is not supposed to be able to affect the parent.

After thinking a bit more about it, you are right that I should not use
the term "not delegatable" here. I will rephrase in the next version.

Cheers,
Longman
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