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dma-debug: add a schedule point in debug_dma_dump_mappings()
[ Upstream commit 9ff6aa027d
]
debug_dma_dump_mappings() can take a lot of cpu cycles :
lpk43:/# time wc -l /sys/kernel/debug/dma-api/dump
163435 /sys/kernel/debug/dma-api/dump
real 0m0.463s
user 0m0.003s
sys 0m0.459s
Let's add a cond_resched() to avoid holding cpu for too long.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Corentin Labbe <clabbe@baylibre.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -437,6 +437,7 @@ void debug_dma_dump_mappings(struct device *dev)
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}
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spin_unlock_irqrestore(&bucket->lock, flags);
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cond_resched();
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}
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}
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EXPORT_SYMBOL(debug_dma_dump_mappings);
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