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[RFC,v2,0/1] scsi: mpi3mr: Introduce smp_affinity_enable module parameter

Message ID 20250601014056.128716-1-atomlin@atomlin.com
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Series scsi: mpi3mr: Introduce smp_affinity_enable module parameter | expand

Message

Aaron Tomlin June 1, 2025, 1:40 a.m. UTC 
I noticed that the Linux MegaRAID driver for SAS based RAID controllers has
the same aforementioned module parameter. Despite the potential performance
drawbacks, I suspect it would be useful with the Broadcom MPI3 Storage
Controller Driver too, to respect the default IRQ affinity.
Please let me know your thoughts.

Changes since v1 [1]
 - Addressed WARN_ON() in pci_alloc_irq_vectors_affinity()
   due to affd != NULL when smp_affinity_enable = 0
 - Avoid unnecessary complexity for a single queue

[1]: https://lore.kernel.org/lkml/20250428094141.1385188-2-atomlin@atomlin.com/

Aaron Tomlin (1):
  scsi: mpi3mr: Introduce smp_affinity_enable module parameter

 drivers/scsi/mpi3mr/mpi3mr.h    |  1 +
 drivers/scsi/mpi3mr/mpi3mr_fw.c | 14 ++++++++++++--
 drivers/scsi/mpi3mr/mpi3mr_os.c | 14 +++++++++++---
 3 files changed, 24 insertions(+), 5 deletions(-)