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    SubjectRe: [PATCH tip/core/rcu 13/22] rcu: Fix grace-period hangs due to race with CPU offline
    On Tue, Jun 26, 2018 at 09:48:07PM +0200, Peter Zijlstra wrote:
    > 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.

    Sounds like I should queue a patch to replace them all with
    ____cacheline_aligned_in_smp.

    Any objections?

    (I don't consider this an emergency, so I would queue it for the merge
    window following the next one.)

    Thanx, Paul

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