tree 383ecef4d95949a95398910a91ba5ff70913eda7
parent 441258ca6916dc80ff0c7edfbb7262fce3cd979a
author Eric Dumazet <edumazet@google.com> 1572299806 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1578141644 +0100

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

[ Upstream commit 9ff6aa027dbb98755f0265695354f2dd07c0d1ce ]

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>