[Linuxarm] Re: [PATCH] sched/topology: fix the issue groups don't span domain->span for NUMA diameter > 2

On 02/02/21 15:17, Valentin Schneider wrote:

That is, rather than building overlapping groups and fixing them whenever that breaks (distance > 2), we could have:

• the local group being the child domain's span (as always)
• all non-local NUMA groups spanning a single node each, with the right sgc cross-referencing.

Thoughts?

Hmph I'm thinking this can be broken by domain degeneration, as nothing will come fix up the ->sgc link and we'd be back to having a reference to a group that doesn't get updated...