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Mikulas Patocka e202dad519 dma-debug: change allocation mode from GFP_NOWAIT to GFP_ATIOMIC

[ Upstream commit 84bc4f1dbb ]

We observed the error "cacheline tracking ENOMEM, dma-debug disabled"
during a light system load (copying some files). The reason for this error
is that the dma_active_cacheline radix tree uses GFP_NOWAIT allocation -
so it can't access the emergency memory reserves and it fails as soon as
anybody reaches the watermark.

This patch changes GFP_NOWAIT to GFP_ATOMIC, so that it can access the
emergency memory reserves.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-06-09 10:22:37 +02:00

coherent.c

dma-mapping: make the global coherent pool conditional

2021-08-19 09:02:39 +02:00

contiguous.c

dma-contiguous: fix a typo error in a comment

2020-11-27 10:33:42 +01:00

debug.c

dma-debug: change allocation mode from GFP_NOWAIT to GFP_ATIOMIC

2022-06-09 10:22:37 +02:00

debug.h

dma-debug: teach add_dma_entry() about DMA_ATTR_SKIP_CPU_SYNC