All of lore.kernel.org
 help / color / mirror / Atom feed
From: Bart Van Assche <bvanassche@acm.org>
To: 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>,
	Bart Van Assche <bvanassche@acm.org>
Subject: [PATCH 0/9] Rework runtime suspend and SCSI domain validation
Date: Sat,  5 Sep 2020 18:22:10 -0700	[thread overview]
Message-ID: <20200906012219.17893-1-bvanassche@acm.org> (raw)

Hi Jens,

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.

Please consider this patch series for kernel v5.10.

Thanks,

Bart.

Alan Stern (1):
  block: Do not accept any requests while suspended

Bart Van Assche (8):
  block: Fix a race in the runtime power management code
  ide: Do not set the RQF_PREEMPT flag for sense requests
  scsi: Pass a request queue pointer to __scsi_execute()
  scsi: Rework scsi_mq_alloc_queue()
  scsi: Do not wait for a request in scsi_eh_lock_door()
  scsi_transport_spi: Make spi_execute() accept a request queue pointer
  scsi_transport_spi: Freeze request queues instead of quiescing
  block, scsi, ide: Only process PM requests if rpm_status != RPM_ACTIVE

 block/blk-core.c                  |  12 +--
 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              |   3 +-
 drivers/ide/ide-pm.c              |   2 +-
 drivers/scsi/scsi_error.c         |   3 +-
 drivers/scsi/scsi_lib.c           |  73 ++++++++--------
 drivers/scsi/scsi_priv.h          |   2 +
 drivers/scsi/scsi_transport_spi.c | 139 +++++++++++++++++-------------
 include/linux/blk-mq.h            |   4 +-
 include/linux/blkdev.h            |   6 +-
 include/scsi/scsi_device.h        |  14 ++-
 15 files changed, 158 insertions(+), 135 deletions(-)


             reply	other threads:[~2020-09-06  1:22 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-06  1:22 Bart Van Assche [this message]
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
2020-09-30  2:47     ` Martin K. Petersen
2020-09-29 12:33   ` Martin Kepplinger

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200906012219.17893-1-bvanassche@acm.org \
    --to=bvanassche@acm.org \
    --cc=axboe@kernel.dk \
    --cc=hch@lst.de \
    --cc=jejb@linux.vnet.ibm.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    --cc=stern@rowland.harvard.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.