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From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: Bart Van Assche <bvanassche@acm.org>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
	Christoph Hellwig <hch@lst.de>, Ming Lei <ming.lei@redhat.com>,
	linux-scsi@vger.kernel.org, linux-block@vger.kernel.org
Subject: Re: [PATCH v4 0/9] Rework runtime suspend and SPI domain validation
Date: Tue, 01 Dec 2020 20:51:19 -0500	[thread overview]
Message-ID: <yq1k0u1c6ye.fsf@ca-mkp.ca.oracle.com> (raw)
In-Reply-To: <20201130024615.29171-1-bvanassche@acm.org> (Bart Van Assche's message of "Sun, 29 Nov 2020 18:46:06 -0800")


Jens,

Any objections to me picking this up?

> The SCSI runtime suspend and SPI domain validation mechanisms both use
> scsi_device_quiesce(). scsi_device_quiesce() restricts
> blk_queue_enter() to BLK_MQ_REQ_PREEMPT requests. There is a conflict
> between the requirements of runtime suspend and SCSI domain
> validation: no requests must be sent to runtime suspended devices that
> are in the state RPM_SUSPENDED while BLK_MQ_REQ_PREEMPT requests must
> be processed during SCSI domain validation. This conflict is resolved
> by reworking the SCSI domain validation implementation.
>
> Hybernation, runtime suspend and SCSI domain validation have been
> retested.

-- 
Martin K. Petersen	Oracle Linux Engineering

  parent reply	other threads:[~2020-12-02  1:52 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-30  2:46 [PATCH v4 0/9] Rework runtime suspend and SPI domain validation Bart Van Assche
2020-11-30  2:46 ` [PATCH v4 1/9] block: Fix a race in the runtime power management code Bart Van Assche
2020-11-30  2:46 ` [PATCH v4 2/9] block: Introduce BLK_MQ_REQ_PM Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-12-02  6:50   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 3/9] ide: Do not set the RQF_PREEMPT flag for sense requests Bart Van Assche
2020-12-01 11:29   ` Christoph Hellwig
2020-12-02  6:52   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 4/9] ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-12-02  6:53   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 5/9] scsi: Do not wait for a request in scsi_eh_lock_door() Bart Van Assche
2020-12-02  7:06   ` Hannes Reinecke
2020-12-03  5:10     ` Bart Van Assche
2020-12-03  7:18       ` Hannes Reinecke
2020-12-03  7:27         ` Ming Lei
2020-12-04 16:50           ` Bart Van Assche
2020-11-30  2:46 ` [PATCH v4 6/9] scsi_transport_spi: Set RQF_PM for domain validation commands Bart Van Assche
2020-12-01 11:31   ` Christoph Hellwig
2020-11-30  2:46 ` [PATCH v4 7/9] scsi: Only process PM requests if rpm_status != RPM_ACTIVE Bart Van Assche
2020-12-01 11:32   ` Christoph Hellwig
2020-12-02  7:14   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 8/9] block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT Bart Van Assche
2020-12-01 11:33   ` Christoph Hellwig
2020-12-02  7:15   ` Hannes Reinecke
2020-11-30  2:46 ` [PATCH v4 9/9] block: Do not accept any requests while suspended Bart Van Assche
2020-12-02  7:16   ` Hannes Reinecke
2020-12-02  1:51 ` Martin K. Petersen [this message]
2020-12-06  0:01   ` [PATCH v4 0/9] Rework runtime suspend and SPI domain validation Jens Axboe
2020-12-08  1:56 ` Martin K. Petersen

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