On Wed, Feb 26, 2014 at 10:14:21AM -0500, Waiman Long wrote:
> +struct qnode {
> + u32 wait; /* Waiting flag */
> + struct qnode *next; /* Next queue node addr */
> +};
> +
> +struct qnode_set {
> + struct qnode nodes[MAX_QNODES];
> + int node_idx; /* Current node to use */
> +};
> +
> +/*
> + * Per-CPU queue node structures
> + */
> +static DEFINE_PER_CPU_ALIGNED(struct qnode_set, qnset) = { {{0}}, 0 };
So I've not yet wrapped my head around any of this; and I see a later
patch adds some paravirt gunk to this, but it does blow you can't keep
it a single cacheline for the sane case.
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