On Mon, Feb 17, 2014 at 03:41:22PM -0500, Waiman Long wrote:
> +/*
> + * The queue node structure
> + *
> + * This structure is essentially the same as the mcs_spinlock structure
> + * in mcs_spinlock.h file. This structure is retained for future extension
> + * where new fields may be added.
> + */
> +struct qnode {
> + u32 wait; /* Waiting flag */
> + struct qnode *next; /* Next queue node addr */
> +};
> +
> +struct qnode_set {
> + int node_idx; /* Current node to use */
> + struct qnode nodes[MAX_QNODES];
> +};
> +
> +/*
> + * Per-CPU queue node structures
> + */
> +static DEFINE_PER_CPU(struct qnode_set, qnset) ____cacheline_aligned
> + = { 0 };
You really didn't pay attention did you.
That should be DEFINE_PER_CPU_ALIGNED()
Furthermore, your structure is bigger than 1 cacheline; your struct
qnode is 16 bytes, 4*16=64, and then you add that int.
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