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-rw-r--r--block/blk-mq.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a428798e1c5c..c338c9bc5a2c 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -650,6 +650,14 @@ static inline bool blk_mq_complete_need_ipi(struct request *rq)
if (!IS_ENABLED(CONFIG_SMP) ||
!test_bit(QUEUE_FLAG_SAME_COMP, &rq->q->queue_flags))
return false;
+ /*
+ * With force threaded interrupts enabled, raising softirq from an SMP
+ * function call will always result in waking the ksoftirqd thread.
+ * This is probably worse than completing the request on a different
+ * cache domain.
+ */
+ if (force_irqthreads)
+ return false;
/* same CPU or cache domain? Complete locally */
if (cpu == rq->mq_ctx->cpu ||