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authorVasu Dev <vasu.dev@intel.com>2011-09-27 21:38:08 -0700
committerJames Bottomley <JBottomley@Parallels.com>2011-10-02 12:56:50 -0500
commite17b4af7c7a6f5c24b0e6b856bb45a1a22be75f5 (patch)
tree19487ec0ae0599c2999368aec1c20b96e6021191 /drivers/scsi/libfc
parent49a198898e889038c6601288cd2b0e037edada24 (diff)
[SCSI] libfc: cache align fc_exch_pool
fix holes and better cache aligned fields. Signed-off-by: Vasu Dev <vasu.dev@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Yi Zou <yi.zou@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/libfc')
-rw-r--r--drivers/scsi/libfc/fc_exch.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 01ff082dc34c..a78655b86cb7 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -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.