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Commit e17b4af7 authored by Vasu Dev's avatar Vasu Dev Committed by James Bottomley
Browse files

[SCSI] libfc: cache align fc_exch_pool 



fix holes and better cache aligned fields.

Signed-off-by: default avatarVasu Dev <vasu.dev@intel.com>
Tested-by: default avatarRoss Brattain <ross.b.brattain@intel.com>
Signed-off-by: default avatarYi Zou <yi.zou@intel.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 49a19889

drivers/scsi/libfc/fc_exch.c

+5 −6
Original line number Diff line number Diff line
@@ -65,16 +65,15 @@ static struct workqueue_struct *fc_exch_workqueue; 
 * assigned range of exchanges to per cpu pool.

 */

struct fc_exch_pool {

	spinlock_t	 lock;

	struct list_head ex_list;

	u16		 next_index;

	u16		 total_exches;



	/* two cache of free slot in exch array */

	u16		 left;

	u16		 right;



	spinlock_t	 lock;

	struct list_head ex_list;

};

} ____cacheline_aligned_in_smp;



/**

 * struct fc_exch_mgr - The Exchange Manager (EM).
@@ -91,13 +90,13 @@ struct fc_exch_pool { 
 * It manages the allocation of exchange IDs.

 */

struct fc_exch_mgr {

	struct fc_exch_pool *pool;

	mempool_t	*ep_pool;

	enum fc_class	class;

	struct kref	kref;

	u16		min_xid;

	u16		max_xid;

	mempool_t	*ep_pool;

	u16		pool_max_index;

	struct fc_exch_pool *pool;



	/*

	 * currently exchange mgr stats are updated but not used.