From 6bf3b630d0a733b74f7167a1cfac457358e67074 Mon Sep 17 00:00:00 2001 From: Raghava Aditya Renukunta Date: Wed, 3 Feb 2016 15:05:59 -0800 Subject: aacraid: SCSI blk tag support The method to allocate and free FIB's in the present code utilizes spinlocks. Multiple IO's have to wait on the spinlock to acquire or free fibs creating a performance bottleneck. An alternative solution would be to use block layer tags to keep track of the fibs allocated and freed. To this end aac_fib_alloc_tag was created to utilize the blk layer tags to plug into the Fib pool.These functions are used exclusively in the IO path. 8 fibs are reserved for the use of AIF management software and utilize the previous spinlock based implementations. Signed-off-by: Raghava Aditya Renukunta Reviewed-by: Shane Seymour Reviewed-by: Johannes Thumshirn Reviewed-by: Tomas Henzl Signed-off-by: Martin K. Petersen --- drivers/scsi/aacraid/dpcsup.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/scsi/aacraid/dpcsup.c') diff --git a/drivers/scsi/aacraid/dpcsup.c b/drivers/scsi/aacraid/dpcsup.c index da9d9936e995..d677b52860ae 100644 --- a/drivers/scsi/aacraid/dpcsup.c +++ b/drivers/scsi/aacraid/dpcsup.c @@ -394,7 +394,6 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, fib->callback(fib->callback_data, fib); } else { aac_fib_complete(fib); - aac_fib_free(fib); } } else { unsigned long flagv; @@ -416,7 +415,6 @@ unsigned int aac_intr_normal(struct aac_dev *dev, u32 index, fib->done = 0; spin_unlock_irqrestore(&fib->event_lock, flagv); aac_fib_complete(fib); - aac_fib_free(fib); } } -- cgit v1.2.3-55-g7522