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| author | Ming Lei <ming.lei@redhat.com> | 2022-12-27 10:29:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-10 17:10:33 +0100 |
| commit | aeeb4e4e49f8118d00cf803581555a2a2905759c (patch) | |
| tree | f9bb759835c1fc6e8bff03469c78b9e6c3f84fb3 /include | |
| parent | 9e84d7bb15053bd260138b1aae59c038f7692218 (diff) | |
| download | linux-aeeb4e4e49f8118d00cf803581555a2a2905759c.tar.gz linux-aeeb4e4e49f8118d00cf803581555a2a2905759c.tar.bz2 linux-aeeb4e4e49f8118d00cf803581555a2a2905759c.zip | |
genirq/affinity: Don't pass irq_affinity_desc array to irq_build_affinity_masks
[ Upstream commit e7bdd7f0cbd1c001bb9b4d3313edc5ee094bc3f8 ]
Prepare for abstracting irq_build_affinity_masks() into a public function
for assigning all CPUs evenly into several groups.
Don't pass irq_affinity_desc array to irq_build_affinity_masks, instead
return a cpumask array by storing each assigned group into one element of
the array.
This allows to provide a generic interface for grouping all CPUs evenly
from a NUMA and CPU locality viewpoint, and the cost is one extra allocation
in irq_build_affinity_masks(), which should be fine since it is done via
GFP_KERNEL and irq_build_affinity_masks() is a slow path anyway.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20221227022905.352674-4-ming.lei@redhat.com
Stable-dep-of: 0263f92fadbb ("lib/group_cpus.c: avoid acquiring cpu hotplug lock in group_cpus_evenly")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions