From: Bart Van Assche <bvanassche@acm.org>
To: "Martin K . Petersen" <martin.petersen@oracle.com>
Cc: "James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
Hannes Reinecke <hare@suse.de>, Ming Lei <ming.lei@redhat.com>,
linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH v5 0/8] Rework runtime suspend and SPI domain validation
Date: Tue, 8 Dec 2020 21:29:43 -0800 [thread overview]
Message-ID: <20201209052951.16136-1-bvanassche@acm.org> (raw)
Hi Martin,
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.
Please consider this patch series for kernel v5.11.
Thanks,
Bart.
Changes between v4 and v5:
- Fixed the CONFIG_PM=n build.
- Left out patch "scsi: Do not wait for a request in scsi_eh_lock_door()".
Changes between v3 and v4:
- Instead of creating a second request queue for SPI DV, set RQF_PM.
Changes between v2 and v3:
- Inlined scsi_mq_alloc_queue() into scsi_alloc_sdev() as requested by
Christoph.
Changes between v1 and v2:
- Rebased this patch series on top of kernel v5.10-rc1.
Alan Stern (1):
block: Do not accept any requests while suspended
Bart Van Assche (7):
block: Fix a race in the runtime power management code
block: Introduce BLK_MQ_REQ_PM
ide: Do not set the RQF_PREEMPT flag for sense requests
ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT
scsi_transport_spi: Set RQF_PM for domain validation commands
scsi: Only process PM requests if rpm_status != RPM_ACTIVE
block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT
block/blk-core.c | 13 +++++++------
block/blk-mq-debugfs.c | 1 -
block/blk-mq.c | 4 ++--
block/blk-pm.c | 15 +++++++++------
block/blk-pm.h | 14 +++++++++-----
drivers/ide/ide-atapi.c | 1 -
drivers/ide/ide-io.c | 7 +------
drivers/ide/ide-pm.c | 2 +-
drivers/scsi/scsi_lib.c | 27 ++++++++++++++-------------
drivers/scsi/scsi_transport_spi.c | 27 +++++++++++++++++++--------
include/linux/blk-mq.h | 4 ++--
include/linux/blkdev.h | 18 +++++++++++++-----
12 files changed, 77 insertions(+), 56 deletions(-)
next reply other threads:[~2020-12-09 5:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-09 5:29 Bart Van Assche [this message]
2020-12-09 5:29 ` [PATCH v5 1/8] block: Fix a race in the runtime power management code Bart Van Assche
2020-12-09 5:29 ` [PATCH v5 2/8] block: Introduce BLK_MQ_REQ_PM Bart Van Assche
2020-12-09 6:06 ` Can Guo
2020-12-09 5:29 ` [PATCH v5 3/8] ide: Do not set the RQF_PREEMPT flag for sense requests Bart Van Assche
2020-12-09 5:29 ` [PATCH v5 4/8] ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT Bart Van Assche
2020-12-09 5:29 ` [PATCH v5 5/8] scsi_transport_spi: Set RQF_PM for domain validation commands Bart Van Assche
2020-12-09 7:34 ` Hannes Reinecke
2020-12-09 5:29 ` [PATCH v5 6/8] scsi: Only process PM requests if rpm_status != RPM_ACTIVE Bart Van Assche
2020-12-09 6:06 ` Can Guo
2020-12-09 5:29 ` [PATCH v5 7/8] block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT Bart Van Assche
2020-12-09 6:05 ` Can Guo
2020-12-09 5:29 ` [PATCH v5 8/8] block: Do not accept any requests while suspended Bart Van Assche
2020-12-09 6:04 ` Can Guo
2020-12-09 7:36 ` Hannes Reinecke
2020-12-09 16:44 ` [PATCH v5 0/8] Rework runtime suspend and SPI domain validation Martin K. Petersen
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