From: Tyrel Datwyler <tyreld@linux.ibm.com>
To: james.bottomley@hansenpartnership.com
Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
brking@linux.ibm.com, Tyrel Datwyler <tyreld@linux.ibm.com>
Subject: [PATCH 0/5] ibmvfc: MQ preparatory locking work
Date: Fri, 18 Dec 2020 17:19:11 -0600 [thread overview]
Message-ID: <20201218231916.279833-1-tyreld@linux.ibm.com> (raw)
The ibmvfc driver in its current form relies heavily on the host_lock. This
patchset introduces a genric queue with its own queue lock and sent/free event
list locks. This generic queue allows the driver to decouple the primary queue
and future subordinate queues from the host lock reducing lock contention while
also relaxing locking for submissions and completions to simply the list lock of
the queue in question.
Tyrel Datwyler (5):
ibmvfc: define generic queue structure for CRQs
ibmvfc: make command event pool queue specific
ibmvfc: define per-queue state/list locks
ibmvfc: complete commands outside the host/queue lock
ibmvfc: relax locking around ibmvfc_queuecommand
drivers/scsi/ibmvscsi/ibmvfc.c | 379 ++++++++++++++++++++++-----------
drivers/scsi/ibmvscsi/ibmvfc.h | 54 +++--
2 files changed, 286 insertions(+), 147 deletions(-)
--
2.27.0
next reply other threads:[~2020-12-18 23:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-18 23:19 Tyrel Datwyler [this message]
2020-12-18 23:19 ` [PATCH 1/5] ibmvfc: define generic queue structure for CRQs Tyrel Datwyler
2020-12-18 23:19 ` [PATCH 2/5] ibmvfc: make command event pool queue specific Tyrel Datwyler
2020-12-18 23:19 ` [PATCH 3/5] ibmvfc: define per-queue state/list locks Tyrel Datwyler
2020-12-18 23:19 ` [PATCH 4/5] ibmvfc: complete commands outside the host/queue lock Tyrel Datwyler
2020-12-29 2:29 ` kernel test robot
2021-01-04 22:17 ` [PATCH 4/5 v2] ibmvfc: relax locking around ibmvfc_queuecommand Tyrel Datwyler
2021-01-04 22:19 ` Tyrel Datwyler
2021-01-04 22:24 ` [PATCH v2 4/5] ibmvfc: complete commands outside the host/queue lock Tyrel Datwyler
2021-01-06 4:42 ` Martin K. Petersen
2021-01-06 17:18 ` Tyrel Datwyler
2020-12-18 23:19 ` [PATCH 5/5] ibmvfc: relax locking around ibmvfc_queuecommand Tyrel Datwyler
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