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From: Ming Lei <ming.lei@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>, Jens Axboe <axboe@kernel.dk>
Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	Christoph Hellwig <hch@lst.de>, Ming Lei <ming.lei@redhat.com>
Subject: [RFC PATCH 0/7] genirq/affinity: abstract new API from managed irq affinity spread
Date: Mon, 19 Jul 2021 17:57:22 +0800	[thread overview]
Message-ID: <20210719095729.834332-1-ming.lei@redhat.com> (raw)

Hello,

irq_build_affinity_masks() actually grouping CPUs evenly into each managed
irq vector according to NUMA and CPU locality, and it is reasonable to abstract
one generic API for grouping CPUs evenly, the idea is suggested by Thomas
Gleixner.

group_cpus_evenly() is abstracted and put into lib/, so blk-mq can re-use
it to build default queue mapping.

Please comments!

Thanks,

Ming Lei (7):
  genirq/affinity: remove the 'firstvec' parameter from
    irq_build_affinity_masks
  genirq/affinity: pass affinity managed mask array to
    irq_build_affinity_masks
  genirq/affinity: don't pass irq_affinity_desc array to
    irq_build_affinity_masks
  genirq/affinity: rename irq_build_affinity_masks as group_cpus_evenly
  genirq/affinity: move group_cpus_evenly() into lib/
  lib/group_cpus: allow to group cpus in case of !CONFIG_SMP
  blk-mq: build default queue map via group_cpus_evenly()

 block/blk-mq-cpumap.c      |  64 ++----
 include/linux/group_cpus.h |  28 +++
 kernel/irq/affinity.c      | 404 +-----------------------------------
 lib/Makefile               |   2 +
 lib/group_cpus.c           | 413 +++++++++++++++++++++++++++++++++++++
 5 files changed, 465 insertions(+), 446 deletions(-)
 create mode 100644 include/linux/group_cpus.h
 create mode 100644 lib/group_cpus.c

-- 
2.31.1


             reply	other threads:[~2021-07-19  9:57 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19  9:57 Ming Lei [this message]
2021-07-19  9:57 ` [RFC PATCH 1/7] genirq/affinity: remove the 'firstvec' parameter from irq_build_affinity_masks Ming Lei
2021-07-19  9:57 ` [RFC PATCH 2/7] genirq/affinity: pass affinity managed mask array to irq_build_affinity_masks Ming Lei
2021-07-19  9:57 ` [RFC PATCH 3/7] genirq/affinity: don't pass irq_affinity_desc " Ming Lei
2021-07-19  9:57 ` [RFC PATCH 4/7] genirq/affinity: rename irq_build_affinity_masks as group_cpus_evenly Ming Lei
2021-07-19  9:57 ` [RFC PATCH 5/7] genirq/affinity: move group_cpus_evenly() into lib/ Ming Lei
2021-07-19  9:57 ` [RFC PATCH 6/7] lib/group_cpus: allow to group cpus in case of !CONFIG_SMP Ming Lei
2021-07-19  9:57 ` [RFC PATCH 7/7] blk-mq: build default queue map via group_cpus_evenly() Ming Lei
2021-07-26 10:37 ` [RFC PATCH 0/7] genirq/affinity: abstract new API from managed irq affinity spread Ming Lei

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