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authorQuinn Tran <quinn.tran@qlogic.com>2015-12-17 14:57:07 -0500
committerNicholas Bellinger <nab@linux-iscsi.org>2016-01-07 13:57:48 -0800
commit2f424b9b36ad7062e9ade41a9fb034d21a9e4e4b (patch)
tree16b9022e3a39b29ea0d495db00610e0535fe805a /drivers/scsi/qla2xxx/qla_def.h
parentfb3269baf4ecc2ce6d17d4eb537080035bdf6d5b (diff)
downloadlinux-2f424b9b36ad7062e9ade41a9fb034d21a9e4e4b.tar.gz
qla2xxx: Move atioq to a different lock to reduce lock contention
99% of the time the ATIOQ has SCSI command. The other 1% of time is something else. Most of the time this interrupt does not need to hold the hardware_lock. We're moving the ATIO interrupt thread to a different lock to reduce lock contention. Signed-off-by: Quinn Tran <quinn.tran@qlogic.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_def.h')
-rw-r--r--drivers/scsi/qla2xxx/qla_def.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index c4fc32e9aaf9..96c5ffe1e831 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2936,6 +2936,7 @@ struct qlt_hw_data {
uint32_t leak_exchg_thresh_hold;
spinlock_t sess_lock;
int rspq_vector_cpuid;
+ spinlock_t atio_lock ____cacheline_aligned;
};
#define MAX_QFULL_CMDS_ALLOC 8192