linux-kernel - [PATCH] dma-debug: Make things less spammy under memory pressure

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Message-Id: <20220531215106.192271-1-robdclark@gmail.com>
Date:   Tue, 31 May 2022 14:51:06 -0700
From:   Rob Clark <robdclark@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org, Rob Clark <robdclark@...omium.org>,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org (open list:DMA MAPPING HELPERS)
Subject: [PATCH] dma-debug: Make things less spammy under memory pressure

From: Rob Clark <robdclark@...omium.org>

Ratelimit the error msg to avoid flooding the console.

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 kernel/dma/debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c
index f8ff598596b8..683966f0247b 100644
--- a/kernel/dma/debug.c
+++ b/kernel/dma/debug.c
@@ -564,7 +564,7 @@ static void add_dma_entry(struct dma_debug_entry *entry, unsigned long attrs)
 
 	rc = active_cacheline_insert(entry);
 	if (rc == -ENOMEM) {
-		pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
+		pr_err_ratelimited("cacheline tracking ENOMEM, dma-debug disabled\n");
 		global_disable = true;
 	} else if (rc == -EEXIST && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) {
 		err_printk(entry->dev, entry,
-- 
2.36.1