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From: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
To: linux-scsi@vger.kernel.org, martin.petersen@oracle.com
Cc: suganath-prabu.subramani@broadcom.com,
	sathya.prakash@broadcom.com,
	Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Subject: [PATCH v1 09/10] mpt3sas: Remove usage of device_busy counter
Date: Thu, 26 Dec 2019 06:13:32 -0500	[thread overview]
Message-ID: <20191226111333.26131-10-sreekanth.reddy@broadcom.com> (raw)
In-Reply-To: <20191226111333.26131-1-sreekanth.reddy@broadcom.com>

Remove usage of device_busy counter from driver. Instead of
device_busy counter now driver uses 'nr_active' counter of
request_queue to get the number of inflight request for a
LUN.

Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index aa43c66..501e9ba 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -3573,6 +3573,22 @@ _base_get_msix_index(struct MPT3SAS_ADAPTER *ioc,
 	return ioc->cpu_msix_table[raw_smp_processor_id()];
 }
 
+/**
+ * _base_sdev_nr_inflight_request -get number of inflight requests
+ *				   of a request queue.
+ * @q: request_queue object
+ *
+ * returns number of inflight request of a request queue.
+ */
+inline unsigned long
+_base_sdev_nr_inflight_request(struct request_queue *q)
+{
+	struct blk_mq_hw_ctx *hctx = q->queue_hw_ctx[0];
+
+	return atomic_read(&hctx->nr_active);
+}
+
+
 /**
  * _base_get_high_iops_msix_index - get the msix index of
  *				high iops queues
@@ -3592,7 +3608,7 @@ _base_get_high_iops_msix_index(struct MPT3SAS_ADAPTER *ioc,
 	 * reply queues in terms of batch count 16 when outstanding
 	 * IOs on the target device is >=8.
 	 */
-	if (atomic_read(&scmd->device->device_busy) >
+	if (_base_sdev_nr_inflight_request(scmd->device->request_queue) >
 	    MPT3SAS_DEVICE_HIGH_IOPS_DEPTH)
 		return base_mod64((
 		    atomic64_add_return(1, &ioc->high_iops_outstanding) /
-- 
2.18.1


  parent reply	other threads:[~2019-12-26 11:14 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-26 11:13 [PATCH v1 00/10] mpt3sas: Enhancements of phase14 Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 01/10] mpt3sas: Update MPI Headers to v02.00.57 Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 02/10] mpt3sas: Add support for NVMe shutdown Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 03/10] mpt3sas: renamed _base_after_reset_handler function Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 04/10] mpt3sas: Add support IOCs new state named COREDUMP Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 05/10] mpt3sas: Handle CoreDump state from watchdog thread Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 06/10] mpt3sas: print in which path firmware fault occurred Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 07/10] mpt3sas: Optimize mpt3sas driver logging Sreekanth Reddy
2019-12-26 11:13 ` [PATCH v1 08/10] mpt3sas: Print function name in which cmd timed out Sreekanth Reddy
2019-12-26 11:13 ` Sreekanth Reddy [this message]
2019-12-26 11:13 ` [PATCH v1 10/10] mpt3sas: Update drive version to 33.100.00.00 Sreekanth Reddy
2020-01-03  3:23 ` [PATCH v1 00/10] mpt3sas: Enhancements of phase14 Martin K. Petersen

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