Messages in this thread | | | Date | Tue, 26 Jun 2018 21:48:07 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH tip/core/rcu 13/22] rcu: Fix grace-period hangs due to race with CPU offline |
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On Tue, Jun 26, 2018 at 11:19:37AM -0700, Paul E. McKenney wrote: > The initial reason for ____cacheline_internodealigned_in_smp was that > some of the fields can be accessed by random CPUs, while others are > used more locally, give or take our usual contention over the handling > of CPU numbers. ;-)
So that whole internode thing only matters for the insane VSMP case, where they take node to mean a cluster node, not a numa node.
VSMP is a networked shared memory machine where, by necessity, the MESI protocol operates on page granularity.
In general I tend to completely and utterly ignore that and let the VSMP people worry about things.
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