From: Hannes Reinecke <hare@suse.de>
To: Bart Van Assche <bvanassche@acm.org>,
Jens Axboe <axboe@kernel.dk>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
linux-scsi@vger.kernel.org,
Alan Stern <stern@rowland.harvard.edu>
Subject: Re: [PATCH 0/9] Rework runtime suspend and SCSI domain validation
Date: Mon, 21 Sep 2020 08:00:40 +0200 [thread overview]
Message-ID: <ab848686-fe88-7b79-f75a-e192f3e3f3eb@suse.de> (raw)
In-Reply-To: <f4ff6be8-84b6-6f08-8657-21238c99df9c@acm.org>
On 9/19/20 5:45 AM, Bart Van Assche wrote:
> On 2020-09-05 18:22, Bart Van Assche wrote:
>> The SCSI runtime suspend and 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 and runtime suspend have been retested but SCSI domain
>> validation not yet.
>
> Hi Martin and James,
>
> Please advise how to proceed with this patch series. This patch series
> includes an important fix for runtime power management. Unfortunately
> the only way to fix runtime powermanagement is by reworking SPI DV and
> I don't have access to a setup on which I can test the SPI DV changes.
>
I'll check if I can resurrect my setup.
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@suse.de +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
next prev parent reply other threads:[~2020-09-21 6:00 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-06 1:22 [PATCH 0/9] Rework runtime suspend and SCSI domain validation Bart Van Assche
2020-09-06 1:22 ` [PATCH 1/9] block: Fix a race in the runtime power management code Bart Van Assche
2020-09-06 1:22 ` [PATCH 2/9] ide: Do not set the RQF_PREEMPT flag for sense requests Bart Van Assche
2020-09-06 1:22 ` [PATCH 3/9] scsi: Pass a request queue pointer to __scsi_execute() Bart Van Assche
2020-09-06 1:22 ` [PATCH 4/9] scsi: Rework scsi_mq_alloc_queue() Bart Van Assche
2020-09-06 1:22 ` [PATCH 5/9] scsi: Do not wait for a request in scsi_eh_lock_door() Bart Van Assche
2020-09-06 16:03 ` Alan Stern
2020-09-06 1:22 ` [PATCH 6/9] scsi_transport_spi: Make spi_execute() accept a request queue pointer Bart Van Assche
2020-09-06 1:22 ` [PATCH 7/9] scsi_transport_spi: Freeze request queues instead of quiescing Bart Van Assche
2020-09-09 3:51 ` Bart Van Assche
2020-09-06 1:22 ` [PATCH 8/9] block, scsi, ide: Only process PM requests if rpm_status != RPM_ACTIVE Bart Van Assche
2020-09-06 1:22 ` [PATCH 9/9] block: Do not accept any requests while suspended Bart Van Assche
2020-09-06 16:06 ` [PATCH 0/9] Rework runtime suspend and SCSI domain validation Alan Stern
2020-09-19 3:45 ` Bart Van Assche
2020-09-21 6:00 ` Hannes Reinecke [this message]
2020-09-30 2:47 ` Martin K. Petersen
2020-09-29 12:33 ` Martin Kepplinger
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