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| author | Alex Belits <abelits@marvell.com> | 2020-06-26 01:34:41 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-07-08 12:39:01 +0300 |
| commit | 1abdfe706a579a702799fce465bceb9fb01d407c (patch) | |
| tree | 20d48a585227b71d155fcaa3de3536063a8809cf /tools | |
| parent | 46609ce227039fd192e0ecc7d940bed587fd2c78 (diff) | |
| download | linux-1abdfe706a579a702799fce465bceb9fb01d407c.tar.xz | |
lib: Restrict cpumask_local_spread to houskeeping CPUs
The current implementation of cpumask_local_spread() does not respect the
isolated CPUs, i.e., even if a CPU has been isolated for Real-Time task,
it will return it to the caller for pinning of its IRQ threads. Having
these unwanted IRQ threads on an isolated CPU adds up to a latency
overhead.
Restrict the CPUs that are returned for spreading IRQs only to the
available housekeeping CPUs.
Signed-off-by: Alex Belits <abelits@marvell.com>
Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200625223443.2684-2-nitesh@redhat.com
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions