Commit 9ff6aa02 authored by Eric Dumazet's avatar Eric Dumazet Committed by Christoph Hellwig

dma-debug: add a schedule point in debug_dma_dump_mappings()

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: default avatarEric 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: default avatarChristoph Hellwig <hch@lst.de>
parent 4544b9f2
...@@ -420,6 +420,7 @@ void debug_dma_dump_mappings(struct device *dev) ...@@ -420,6 +420,7 @@ void debug_dma_dump_mappings(struct device *dev)
} }
spin_unlock_irqrestore(&bucket->lock, flags); spin_unlock_irqrestore(&bucket->lock, flags);
cond_resched();
} }
} }
......
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