[V3,0/14] blk-mq: fix wrong queue mapping for kdump kernel

Message

Ming Lei Aug. 8, 2023, 10:42 a.m. UTC

Hi,

Fix wrong queue mapping for kdump kernel since blk-mq updates
nr_hw_queues to 1, so driver and blk-mq may have different queue topo.


V3:
	- cover more drivers
	- clean up blk-mq a bit, as suggested by Christoph

V2:
	- add helper of scsi_max_nr_hw_queues() for avoiding potential build
	failure because scsi driver often doesn't deal with blk-mq directly
	- apply scsi_max_nr_hw_queues() for all scsi changes
	- move lpfc's change into managed irq code path


Ming Lei (14):
  blk-mq: add blk_mq_max_nr_hw_queues()
  nvme-pci: use blk_mq_max_nr_hw_queues() to calculate io queues
  ublk: limit max allowed nr_hw_queues
  virtio-blk: limit max allowed submit queues
  scsi: core: add helper of scsi_max_nr_hw_queues()
  scsi: lpfc: use blk_mq_max_nr_hw_queues() to calculate io vectors
  scsi: mpi3mr: take blk_mq_max_nr_hw_queues() into account for
    calculating io vectors
  scsi: megaraid: take blk_mq_max_nr_hw_queues() into account for
    calculating io vectors
  scsi: mpt3sas: take blk_mq_max_nr_hw_queues() into account for
    calculating io vectors
  scsi: pm8001: take blk_mq_max_nr_hw_queues() into account for
    calculating io vectors
  scsi: hisi: take blk_mq_max_nr_hw_queues() into account for
    calculating io vectors
  scsi: ufs: limit max allowed nr_hw_queues
  scsi: storvsc: limit max allowed nr_hw_queues
  blk-mq: add helpers for treating kdump kernel

 block/blk-mq.c                            | 55 ++++++++++++++++++-----
 drivers/block/ublk_drv.c                  |  2 +-
 drivers/block/virtio_blk.c                |  3 +-
 drivers/nvme/host/pci.c                   |  2 +-
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c    |  3 ++
 drivers/scsi/lpfc/lpfc_init.c             |  2 +
 drivers/scsi/megaraid/megaraid_sas_base.c |  6 ++-
 drivers/scsi/mpi3mr/mpi3mr_fw.c           |  3 ++
 drivers/scsi/mpt3sas/mpt3sas_base.c       |  4 +-
 drivers/scsi/pm8001/pm8001_init.c         |  4 +-
 drivers/scsi/storvsc_drv.c                |  3 ++
 drivers/ufs/core/ufs-mcq.c                |  2 +-
 include/linux/blk-mq.h                    |  1 +
 include/scsi/scsi_host.h                  |  5 +++
 14 files changed, 75 insertions(+), 20 deletions(-)