linux-kernel - [PATCH 0/5] blk: introduce block layer helpers to calculate num of queues

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Message-Id: <20250617-isolcpus-queue-counters-v1-0-13923686b54b@kernel.org>
Date: Tue, 17 Jun 2025 15:43:22 +0200
From: Daniel Wagner <wagi@...nel.org>
To: Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@....de>
Cc: Keith Busch <kbusch@...nel.org>, Sagi Grimberg <sagi@...mberg.me>, 
 "Michael S. Tsirkin" <mst@...hat.com>, 
 "Martin K. Petersen" <martin.petersen@...cle.com>, 
 Thomas Gleixner <tglx@...utronix.de>, 
 Costa Shulyupin <costa.shul@...hat.com>, Juri Lelli <juri.lelli@...hat.com>, 
 Valentin Schneider <vschneid@...hat.com>, Waiman Long <llong@...hat.com>, 
 Ming Lei <ming.lei@...hat.com>, Frederic Weisbecker <frederic@...nel.org>, 
 Hannes Reinecke <hare@...e.de>, linux-kernel@...r.kernel.org, 
 linux-block@...r.kernel.org, linux-nvme@...ts.infradead.org, 
 megaraidlinux.pdl@...adcom.com, linux-scsi@...r.kernel.org, 
 storagedev@...rochip.com, virtualization@...ts.linux.dev, 
 GR-QLogic-Storage-Upstream@...vell.com, Daniel Wagner <wagi@...nel.org>
Subject: [PATCH 0/5] blk: introduce block layer helpers to calculate num of
 queues

I am still working on the change request for the "blk: honor isolcpus
configuration" series [1]. Teaching group_cpus_evenly to use the
housekeeping mask depending on the context is not a trivial change.

The first part of the series has already been reviewed and doesn't
contain any controversial changes, so let's get them processed
independely.

[1] https://patch.msgid.link/20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org

Signed-off-by: Daniel Wagner <wagi@...nel.org>
---
Changes in from https://patch.msgid.link/20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org
- limit number of allocated masks to the max allocated number of masks
- commit message improvements
- typo fixes
- formatting fixed
- collected tags

---
Daniel Wagner (5):
      lib/group_cpus: Let group_cpu_evenly() return the number of initialized masks
      blk-mq: add number of queue calc helper
      nvme-pci: use block layer helpers to calculate num of queues
      scsi: use block layer helpers to calculate num of queues
      virtio: blk/scsi: use block layer helpers to calculate num of queues

 block/blk-mq-cpumap.c                     | 46 +++++++++++++++++++++++++++++--
 drivers/block/virtio_blk.c                |  5 ++--
 drivers/nvme/host/pci.c                   |  5 ++--
 drivers/scsi/megaraid/megaraid_sas_base.c | 15 ++++++----
 drivers/scsi/qla2xxx/qla_isr.c            | 10 +++----
 drivers/scsi/smartpqi/smartpqi_init.c     |  5 ++--
 drivers/scsi/virtio_scsi.c                |  1 +
 drivers/virtio/virtio_vdpa.c              |  9 +++---
 fs/fuse/virtio_fs.c                       |  6 ++--
 include/linux/blk-mq.h                    |  2 ++
 include/linux/group_cpus.h                |  2 +-
 kernel/irq/affinity.c                     | 11 ++++----
 lib/group_cpus.c                          | 16 +++++------
 13 files changed, 89 insertions(+), 44 deletions(-)
---
base-commit: e04c78d86a9699d136910cfc0bdcf01087e3267e
change-id: 20250617-isolcpus-queue-counters-42ba0ee77390

Best regards,
-- 
Daniel Wagner <wagi@...nel.org>