53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Tue, 14 Jul 2015 14:26:34 +0200
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Subject: block/mq: do not invoke preempt_disable()
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.1-rt3.tar.xz
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preempt_disable() and get_cpu() don't play well together with the sleeping
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locks it tries to allocate later.
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It seems to be enough to replace it with get_cpu_light() and migrate_disable().
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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block/blk-mq.c | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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--- a/block/blk-mq.c
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+++ b/block/blk-mq.c
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@@ -570,7 +570,7 @@ static void __blk_mq_complete_request(st
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return;
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}
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- cpu = get_cpu();
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+ cpu = get_cpu_light();
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if (!test_bit(QUEUE_FLAG_SAME_FORCE, &rq->q->queue_flags))
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shared = cpus_share_cache(cpu, ctx->cpu);
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@@ -582,7 +582,7 @@ static void __blk_mq_complete_request(st
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} else {
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rq->q->softirq_done_fn(rq);
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}
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- put_cpu();
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+ put_cpu_light();
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}
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static void hctx_unlock(struct blk_mq_hw_ctx *hctx, int srcu_idx)
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@@ -1360,14 +1360,14 @@ static void __blk_mq_delay_run_hw_queue(
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return;
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if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
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- int cpu = get_cpu();
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+ int cpu = get_cpu_light();
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if (cpumask_test_cpu(cpu, hctx->cpumask)) {
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__blk_mq_run_hw_queue(hctx);
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- put_cpu();
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+ put_cpu_light();
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return;
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}
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- put_cpu();
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+ put_cpu_light();
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}
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kblockd_mod_delayed_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work,
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