diff options
Diffstat (limited to 'kernel/irq/affinity.c')
| -rw-r--r-- | kernel/irq/affinity.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 6fef48033f96..c7cca942bd8a 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -129,14 +129,26 @@ static int __irq_build_affinity_masks(unsigned int startvec, for_each_node_mask(n, nodemsk) { unsigned int ncpus, v, vecs_to_assign, vecs_per_node; - /* Spread the vectors per node */ - vecs_per_node = (numvecs - (curvec - firstvec)) / nodes; - /* Get the cpus on this node which are in the mask */ cpumask_and(nmsk, cpu_mask, node_to_cpumask[n]); - - /* Calculate the number of cpus per vector */ ncpus = cpumask_weight(nmsk); + if (!ncpus) + continue; + + /* + * Calculate the number of cpus per vector + * + * Spread the vectors evenly per node. If the requested + * vector number has been reached, simply allocate one + * vector for each remaining node so that all nodes can + * be covered + */ + if (numvecs > done) + vecs_per_node = max_t(unsigned, + (numvecs - done) / nodes, 1); + else + vecs_per_node = 1; + vecs_to_assign = min(vecs_per_node, ncpus); /* Account for rounding errors */ @@ -156,13 +168,11 @@ static int __irq_build_affinity_masks(unsigned int startvec, } done += v; - if (done >= numvecs) - break; if (curvec >= last_affv) curvec = firstvec; --nodes; } - return done; + return done < numvecs ? done : numvecs; } /* |