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| author | Keith Busch <keith.busch@intel.com> | 2017-04-13 13:28:12 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-13 23:41:00 +0200 |
| commit | 3412386b531244f24a27c79ee003506a52a00848 (patch) | |
| tree | b793113aa115cb3779d9447f71f39ca6acb4f518 /kernel | |
| parent | 7bf8222b9bd0ba867e18b7f4537b61ef2e92eee8 (diff) | |
| download | linux-0-day-3412386b531244f24a27c79ee003506a52a00848.tar.gz linux-0-day-3412386b531244f24a27c79ee003506a52a00848.tar.xz | |
irq/affinity: Fix extra vecs calculation
This fixes a math error calculating the extra_vecs. The error assumed
only 1 cpu per vector, but the value needs to account for the actual
number of cpus per vector in order to get the correct remainder for
extra CPU assignment.
Fixes: 7bf8222b9bd0 ("irq/affinity: Fix CPU spread for unbalanced nodes")
Reported-by: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Link: http://lkml.kernel.org/r/1492104492-19943-1-git-send-email-keith.busch@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/affinity.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index dc529116f7e6c..d052947fe7850 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -108,7 +108,7 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd) vecs_to_assign = min(vecs_per_node, ncpus); /* Account for rounding errors */ - extra_vecs = ncpus - vecs_to_assign; + extra_vecs = ncpus - vecs_to_assign * (ncpus / vecs_to_assign); for (v = 0; curvec < last_affv && v < vecs_to_assign; curvec++, v++) { |