From 058fe8b766b1dada7fac9df0c687828aa1b6db1e Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Tue, 14 Jul 2015 14:26:34 +0200 Subject: [PATCH 214/352] block/mq: do not invoke preempt_disable() preempt_disable() and get_cpu() don't play well together with the sleeping locks it tries to allocate later. It seems to be enough to replace it with get_cpu_light() and migrate_disable(). Signed-off-by: Sebastian Andrzej Siewior --- block/blk-mq.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index d9c9b4d..29a25ab 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -370,7 +370,7 @@ static void blk_mq_ipi_complete_request(struct request *rq) return; } - cpu = get_cpu(); + cpu = get_cpu_light(); if (!test_bit(QUEUE_FLAG_SAME_FORCE, &rq->q->queue_flags)) shared = cpus_share_cache(cpu, ctx->cpu); @@ -382,7 +382,7 @@ static void blk_mq_ipi_complete_request(struct request *rq) } else { rq->q->softirq_done_fn(rq); } - put_cpu(); + put_cpu_light(); } static void __blk_mq_complete_request(struct request *rq) @@ -913,14 +913,14 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async) return; if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) { - int cpu = get_cpu(); + int cpu = get_cpu_light(); if (cpumask_test_cpu(cpu, hctx->cpumask)) { __blk_mq_run_hw_queue(hctx); - put_cpu(); + put_cpu_light(); return; } - put_cpu(); + put_cpu_light(); } kblockd_schedule_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work); -- 2.7.4