swap: reduce lock contention on swap cache from swap slots allocation

[linux-2.6-microblaze.git] / include / linux / swap.h

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 873bf52..6c23a6a 100644 (file)
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -252,6 +252,7 @@ struct swap_info_struct {
        unsigned int inuse_pages;       /* number of those currently in use */
        unsigned int cluster_next;      /* likely index for next allocation */
        unsigned int cluster_nr;        /* countdown to next cluster search */
+       unsigned int __percpu *cluster_next_cpu; /*percpu index for next allocation */
        struct percpu_cluster __percpu *percpu_cluster; /* per cpu's swap location */
        struct rb_root swap_extent_root;/* root of the swap extent rbtree */
        struct block_device *bdev;      /* swap device or bdev of swap file */