Messages in this thread Patch in this message | | | Date | Thu, 20 Apr 2017 07:06:49 -0700 | From | tip-bot for Keith Busch <> | Subject | [tip:irq/urgent] genirq/affinity: Fix calculating vectors to assign |
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Commit-ID: b72f8051f34b8164a62391e3676edc34523c5952 Gitweb: http://git.kernel.org/tip/b72f8051f34b8164a62391e3676edc34523c5952 Author: Keith Busch <keith.busch@intel.com> AuthorDate: Wed, 19 Apr 2017 19:51:10 -0400 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Thu, 20 Apr 2017 16:03:09 +0200
genirq/affinity: Fix calculating vectors to assign
The vectors_per_node is calculated from the remaining available vectors. The current vector starts after pre_vectors, so we need to subtract that from the current to properly account for the number of remaining vectors to assign.
Fixes: 3412386b531 ("irq/affinity: Fix extra vecs calculation") Reported-by: Andrei Vagin <avagin@virtuozzo.com> Signed-off-by: Keith Busch <keith.busch@intel.com> Link: http://lkml.kernel.org/r/1492645870-13019-1-git-send-email-keith.busch@intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
--- kernel/irq/affinity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index d052947..e2d356d 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -98,7 +98,7 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd) int ncpus, v, vecs_to_assign, vecs_per_node; /* Spread the vectors per node */ - vecs_per_node = (affv - curvec) / nodes; + vecs_per_node = (affv - (curvec - affd->pre_vectors)) / nodes; /* Get the cpus on this node which are in the mask */ cpumask_and(nmsk, cpu_online_mask, cpumask_of_node(n));
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