linux-kernel - Re: [PATCH v2 0/5] ibmvfc: MQ preparatory locking work

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Date:   Wed, 13 Jan 2021 00:48:28 -0500
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Tyrel Datwyler <tyreld@...ux.ibm.com>,
        james.bottomley@...senpartnership.com
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        brking@...ux.ibm.com, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH v2 0/5] ibmvfc: MQ preparatory locking work

On Wed, 6 Jan 2021 14:18:30 -0600, Tyrel Datwyler wrote:

> 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.
> 
> [...]

Applied to 5.12/scsi-queue, thanks!

[1/5] ibmvfc: define generic queue structure for CRQs
      https://git.kernel.org/mkp/scsi/c/f8968665af28
[2/5] ibmvfc: make command event pool queue specific
      https://git.kernel.org/mkp/scsi/c/e4b26f3db864
[3/5] ibmvfc: define per-queue state/list locks
      https://git.kernel.org/mkp/scsi/c/57e80e0bc108
[4/5] ibmvfc: complete commands outside the host/queue lock
      https://git.kernel.org/mkp/scsi/c/1f4a4a19508d
[5/5] ibmvfc: relax locking around ibmvfc_queuecommand
      https://git.kernel.org/mkp/scsi/c/654080d02edb

-- 
Martin K. Petersen	Oracle Linux Engineering